Among these watches with ECG, I rank the Apple Watch Series 11 as the best overall for iPhone owners who want ECG alongside a broad smartwatch experience. The Withings ScanWatch 2 suits readers who prefer a traditional watch look and less frequent charging, while the Fitbit Sense 2 puts stress and wellness tracking alongside ECG. Your main tradeoffs are phone compatibility, how often you want to charge, and whether you need a full smartwatch or a dedicated ECG reader. ECG availability can also vary by country, phone, and software setup. Read on for the full breakdown of the 14 options, including two portable ECG monitors that are not watches.
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Key Takeaways
Phone compatibility is a first filter: Apple Watch models are best suited to iPhone users, while the Galaxy Watch options fit most naturally into the Android and Samsung ecosystem.
The ScanWatch 2 and full smartwatches serve different routines: Withings emphasizes a traditional watch design and longer intervals between charges, while Apple and Samsung add more interactive apps and notifications.
Three Sense 2 listings are one watch in different finishes: Blue Mist/Pale Gold, Shadow Grey/Graphite, and Lunar White/Platinum differ by appearance, not by the ECG role that matters in this comparison.
Portable ECG devices are not wristwatch substitutes: KardiaMobile 6L and EMAY 6L record ECG readings without a wearable display, making them more focused choices for users who can follow their device instructions and app or computer workflow.
Not every listed model has equally clear ECG support: The Galaxy Watch 4 and Watch 4 Classic explicitly identify ECG, while buyers should confirm the feature and regional availability for other listings before choosing based on ECG alone.
| watches with ecg | Battery life | Connectivity | Water resistance |
|---|---|---|---|
| Samsung Galaxy Watch 4 40mm Bl | — | Bluetooth, LTE, GPS | — |
| Fitbit Sense Health and Fitnes | Up to 6+ days | — | Up to 50 meters |
| Garmin Venu 4 Advanced Fitness | Up to 12 days | — | — |
| Fitbit Sense 2 Health and Fitn | More than 6 days | — | 50 meters |
| Fitbit Sense 2 Health and Fitn | 6+ days | Bluetooth | 50 meters |
| Fitbit Sense 2 Health and Fitn | Rated for 6+ days | — | Up to 50 meters |
| Withings ScanWatch 2 Hybrid Sm | Up to 35 days | — | 100 meters; IPX8 |
| Apple Watch Series 11 GPS 42mm | Up to 24 hours of normal use | GPS; works with iPhone or Wi-Fi | Up to 50 meters |
| Samsung Galaxy Watch 8 | — | Bluetooth | — |
| Samsung Galaxy Watch 4 Classic | — | Bluetooth | — |
| Withings ScanWatch 2 Hybrid Sm | Up to 35 days | — | — |
| KardiaMobile 6L EKG | — | — | — |
| EMAY 6L Portable ECG Monitor | | — | USB and Bluetooth | — |
| Apple Watch Series 11 GPS Smar | Up to 24 hours of normal use | GPS | Up to 50 meters |
More Details on Our Top Picks
Samsung Galaxy Watch 4 40mm Bluetooth Smartwatch with ECG, GPS, and Fall Detection – US Version, Black
The Galaxy Watch 4 pairs ECG readings with a broader set of health and fitness tools, including SpO2 and body-composition measurements. That range makes it a more hands-on wellness and training watch than the Fitbit Sense, which puts stronger emphasis on stress, sleep, and longer battery life. Automatic workout detection and VO₂ max tracking are useful for people who want activity data without starting every session manually, while GPS and LTE support can keep some connected tasks phone-free. The main catch is compatibility: some health features require a compatible Samsung phone, so its ECG appeal is less straightforward for owners of other Android phones or iPhones. Its many functions can also feel excessive if ECG is the only feature you want.
Pros:- Combines ECG with heart-rate, SpO2, and body-composition tracking.
- Auto workout detection and VO₂ max tracking add useful context for training.
- GPS and listed LTE connectivity support connected use away from a phone.
- Google services add app, payment, and voice-assistant options.
Cons:- Some health features require a compatible Samsung phone and specific app versions.
- Its many functions may be more than casual users need.
- The 40 mm size may not suit buyers who prefer a larger display.
Best for: Samsung phone owners who want ECG alongside body-composition readings, running metrics, and connected features.
Not ideal for: iPhone owners and people with non-Samsung phones who want every health feature to work without compatibility limits.
- Display size:40 mm
- Model:SM-R860NZKAXAA
- Connectivity:Bluetooth, LTE, GPS
- Health sensors:ECG, heart-rate monitor, SpO2, body composition (BIA)
- Fitness features:Auto workout tracking, VO₂ max, advanced run coaching, group challenges
- Other listed feature:Fall detection
Our verdict“Choose this if you use a compatible Samsung phone and want ECG as part of a feature-rich fitness watch, not as a standalone health tool.”
Fitbit Sense Health and Fitness Smartwatch with GPS, Heart Rate, SpO2, ECG, Skin Temperature and Stress Tracking
The original Fitbit Sense is a strong match for buyers who want ECG within an everyday health dashboard, rather than a watch focused chiefly on sports metrics. Alongside ECG, it tracks sleep, stress, skin-temperature trends, heart rate, and SpO2, while up to 6+ days of battery life means fewer charging interruptions than the Samsung Galaxy Watch 4. Built-in GPS and water resistance to 50 meters also suit walks, runs, and swims without making the watch feel limited to indoor wellness tracking. Its age and regional listing deserve attention, though: this is an international version with no US warranty. Some functions also rely on the Fitbit app, an account, or a paired phone, so it is less appealing to buyers who want ECG with minimal ecosystem dependencies.
Pros:- ECG sits alongside sleep, stress, skin-temperature, heart-rate, and SpO2 tracking.
- Built-in GPS and GLONASS support route tracking without a phone.
- Advertised battery life is up to 6+ days.
- Water resistance to 50 meters supports swimming.
Cons:- The listed international model has no US warranty.
- Some features depend on the Fitbit app, an account, or a smartphone.
- Bluetooth calling and notifications still rely on a paired phone.
Best for: Wellness-focused users who want ECG, sleep and stress trends, built-in GPS, and fewer charging sessions.
Not ideal for: US buyers who need a local warranty, or shoppers who want health features with little reliance on a phone or app account.
- Dimensions:1.59 × 1.59 × 0.49 in
- GPS:Built-in GPS and GLONASS
- Health features:ECG, heart rate, SpO2, skin-temperature trends, stress and sleep tracking
- Water resistance:Up to 50 meters
- Battery life:Up to 6+ days
- Compatibility:iOS 12.2 or later; Android 7.0 or later
- Syncing range:Up to 30 ft
- Model note:International version; no US warranty
Our verdict“Pick the original Sense for broad wellness tracking and longer battery life, provided the international warranty limitation works for you.”
Garmin Venu 4 Advanced Fitness Smartwatch, 45mm, Black Silicone
The Garmin Venu 4 stands apart from the Fitbit Sense and Sense 2 by emphasizing training support and long stretches between charges: its listed battery life is up to 12 days. Health monitoring, sleep tracking, stress management, and personalized coaching make it a capable daily fitness companion, and the colorful display, stainless-steel construction, and built-in flashlight add practical touches beyond workout recording. For an ECG roundup, however, there is a key limitation: the supplied product details do not list an ECG feature. I would not choose it as a substitute for the ECG-equipped Fitbit or Samsung options if recording an ECG is the priority. It makes more sense for buyers who value Garmin-style fitness support and battery life, and who are comfortable with health data that the listing describes as estimates rather than medical measurements.
Pros:- Listed battery life of up to 12 days exceeds the Fitbit Sense models in this group.
- Health monitoring, sleep tracking, stress management, and personalized coaching support daily wellness and training.
- Stainless-steel design and a colorful display suit everyday wear.
- Built-in flashlight adds a practical feature beyond health tracking.
Cons:- ECG is not listed in the supplied product details, so it is a poor fit for ECG-first shoppers.
- Pulse Ox availability varies by country.
- The product states that device data is an estimate, not a medical device.
- Listed wrist fit is limited to 135–200 mm circumference.
Best for: Fitness-focused buyers who prioritize long battery life, coaching, and everyday health trends over ECG recording.
Not ideal for: Anyone choosing a watch specifically to take ECG readings; the supplied product details do not list ECG.
- Size:45 × 45 × 12.5 mm
- Wrist circumference:135–200 mm
- Battery life:Up to 12 days
- Material:Stainless steel
- Display:Colorful display
- Health and wellness:Heart rate, sleep tracking, stress management
- Additional feature:Built-in flashlight
- Pulse Ox availability:Not available in all countries
Our verdict“Choose the Venu 4 for battery endurance and fitness coaching, but select an ECG-listed model if ECG recording is a requirement.”
Fitbit Sense 2 Health and Fitness Smartwatch, Blue Mist/Pale Gold
The Fitbit Sense 2 is the better Fitbit choice for shoppers who want ECG alongside a routine centered on stress, sleep, and daily activity. Its ECG app and irregular-rhythm notifications make it relevant to this roundup, while built-in GPS and more than 40 exercise modes give it wider use than a watch kept mainly for health checks. It also offers Alexa, Google Wallet, and Maps, with a listed battery life of over six days. Compared with the original Fitbit Sense, the Sense 2 keeps the wellness emphasis but adds the newer model’s stated irregular-rhythm notifications and exercise-mode count. Those advantages come with caveats: some health features vary by location, and some functions require Fitbit Premium. Buyers seeking Samsung’s body-composition readings should look instead at the Galaxy Watch 4.
Pros:- Includes an ECG app and irregular-rhythm notifications.
- Built-in GPS and more than 40 exercise modes support varied outdoor and indoor workouts.
- Tracks stress, sleep, heart rate, SpO2, and other health metrics.
- Listed battery life is over six days, with water resistance to 50 meters.
Cons:- Some health features are unavailable in certain countries.
- Some features require a Fitbit Premium membership.
- It does not list the body-composition analysis available on the Galaxy Watch 4.
Best for: Fitbit users who want ECG, stress and sleep tracking, and GPS in a watch suited to daily wellness routines.
Not ideal for: Buyers who need every health feature in their country or want to avoid subscription-dependent features.
- Color:Blue Mist/Pale Gold
- GPS:Built-in
- Exercise modes:More than 40
- Water resistance:50 meters
- Battery life:More than 6 days
- Health features:Stress detection, ECG app, irregular-rhythm notifications, SpO2, health metrics dashboard
- Connectivity and apps:Bluetooth calls and notifications, Amazon Alexa, Google Wallet and Maps
Our verdict“Choose the Sense 2 if Fitbit’s stress and sleep tracking matter as much as ECG, and check local feature access before buying.”
Fitbit Sense 2 Health and Fitness Smartwatch – Shadow Grey/Graphite
This Shadow Grey/Graphite Fitbit Sense 2 offers the same core ECG and wellness proposition as the Blue Mist/Pale Gold Sense 2: stress detection, sleep and activity tracking, built-in GPS, and more than 40 exercise modes. The choice between these two listings is therefore mainly about color preference, not a stated difference in ECG capability. Compared with the original Fitbit Sense, this Sense 2 listing highlights all-day stress detection and Google Wallet and Maps, while retaining a listed battery life of 6+ days and 50-meter water resistance. That makes it a practical everyday fitness watch, but not a reason to expect better ECG readings than the other Sense 2 colorway. Subscription and regional restrictions also apply to some health features, so I would check access before choosing it over the Samsung Galaxy Watch 4.
Pros:- Includes ECG and health tracking for stress, SpO2, and activity.
- Built-in GPS and automatic exercise tracking support workouts away from a phone.
- More than 40 exercise modes and 50-meter water resistance suit varied routines.
- Listed battery life is 6+ days, with Google Wallet and Maps among the smart features.
Cons:- Some health features may require a premium subscription.
- On-wrist calls and notifications may drain the battery faster.
- The supplied details do not identify a functional difference from the other Sense 2 colorway.
Best for: Buyers who prefer the Shadow Grey/Graphite finish and want Fitbit ECG with stress tracking, GPS, and everyday exercise support.
Not ideal for: Shoppers looking for a distinct Sense 2 feature advantage over the Blue Mist/Pale Gold version, or those unwilling to deal with feature restrictions or subscriptions.
- Color:Shadow Grey/Graphite
- Battery life:6+ days
- Water resistance:50 meters
- GPS:Built-in
- Exercise modes:More than 40
- Connectivity:Bluetooth
- Smart features:Amazon Alexa, Google Wallet, Google Maps
- Health features:ECG, SpO2, stress management, automatic exercise tracking
Our verdict“Choose this Sense 2 when its Shadow Grey/Graphite finish is your preference; its ECG and feature set are not presented as different from the other Sense 2 listing.”
Fitbit Sense 2 Health and Fitness Smartwatch, Lunar White/Platinum
The Fitbit Sense 2 is a strong fit for buyers who want an ECG-capable watch as part of a wider routine for stress, sleep, heart rate, and activity tracking. Its built-in GPS and 40-plus exercise modes make it more self-contained for workouts than a watch that relies on a phone for location, while its battery is rated for over six days—far longer than the Apple Watch Series 11’s normal-use estimate. That longer interval means less frequent charging for daily tracking.
The tradeoff is that some health tools depend on location, age, or device, and some features require a nearby phone or Fitbit Premium membership. Compared with the Withings ScanWatch 2, the Sense 2 has a richer smartwatch feature set, including Alexa and notifications, but it cannot match that model’s stated 35-day battery life. Choose it for broad daily wellness tracking; skip it if you want every feature without app or membership dependencies.
Pros:- Combines ECG with stress, sleep, heart-rate, SpO2, and irregular heart rhythm features.
- Built-in GPS and more than 40 exercise modes support phone-free workout tracking.
- Battery is rated for over six days, reducing charging frequency compared with the Apple Watch Series 11.
- Water resistant to 50 meters.
Cons:- Some health features are restricted by country, device, or age.
- Some features require a nearby phone or Fitbit Premium membership.
- The stated battery life is shorter than the Withings ScanWatch 2’s up-to-35-day rating.
Best for: People seeking ECG and everyday stress, sleep, heart-rate, and exercise tracking in a smartwatch with built-in GPS and multi-day battery life.
Not ideal for: Buyers who want all health features available regardless of location or membership, or who prefer a watch with a much longer battery interval like the Withings ScanWatch 2.
- Color:Lunar White/Platinum
- GPS:Built-in
- Water resistance:Up to 50 meters
- Battery life:Rated for 6+ days
- Exercise modes:40+
- Health features:ECG app, irregular heart rhythm notifications, SpO2, heart-rate tracking, stress monitoring
- Connectivity and apps:Bluetooth calls and notifications, Amazon Alexa, Google Wallet and Maps
Our verdict“Choose the Sense 2 if you want ECG alongside broad wellness and workout tracking, and can live with feature availability and membership limits.”
Withings ScanWatch 2 Hybrid Smartwatch, 38 mm
The Withings ScanWatch 2 suits buyers who want ECG tracking without a frequent charging routine. Its battery is rated for up to 35 days, a substantial advantage over the Fitbit Sense 2 and Apple Watch Series 11. The hybrid design also keeps an analog watch face at the center, with a small digital display for selected information; that makes it less like a miniature phone on the wrist and more like a traditional watch with health tools added.
It tracks ECG, heart rate, sleep, and more than 40 sports, and its stainless-steel case and sapphire glass offer a more traditional materials profile than the Apple Watch’s aluminum case. The tradeoff is the 0.63-inch display, which gives less room for on-watch information, along with limited 1 MB storage. Choose this model for long battery life and a restrained look, not for a large, app-focused screen or extensive stored data.
Pros:- Battery is rated for up to 35 days, well beyond the Fitbit Sense 2 and Apple Watch Series 11 estimates.
- Tracks ECG, heart rate, sleep, and more than 40 sports.
- Stainless-steel case and sapphire glass give it a traditional watch construction.
- Built-in GPS and 100-meter water resistance.
Cons:- The 0.63-inch digital display is small for viewing details or notifications.
- Limited 1 MB storage may constrain on-device data capacity.
- Its hybrid interface is less suited to buyers who want a full-featured app experience like the Apple Watch Series 11.
Best for: People who want ECG and core health tracking in a traditional-looking 38 mm watch and value long battery life above a large smartwatch display.
Not ideal for: Buyers who want a roomy screen for reading notifications or a smartwatch experience centered on apps and on-device information.
- Case size:38 mm
- Case and glass:Stainless steel case; sapphire glass
- Display:0.63-inch digital display, 320 x 386 resolution
- Battery life:Up to 35 days
- Water resistance:100 meters; IPX8
- Navigation:Built-in GPS
- Health sensors:ECG, optical heart rate, accelerometer, GPS, temperature sensor
- Compatibility:Android and iOS
- Weight:1.92 ounces
Our verdict“Pick the ScanWatch 2 if long battery life and a conventional watch appearance matter more to you than a large, interactive display.”
Apple Watch Series 11 GPS 42mm with Rose Gold Aluminum Case and Light Blush Sport Band (S/M)
For iPhone owners who want an ECG watch with extensive health and safety tools, the Apple Watch Series 11 puts ECG alongside heart-rate alerts, sleep tracking, Vitals, and possible sleep apnea and hypertension notifications. Fall and crash detection add a separate safety benefit, while the always-on display keeps information visible without a wrist raise. Compared with the Fitbit Sense 2, it offers a more developed safety feature set, but its stated battery life—up to 24 hours of normal use—means charging is a much more regular part of ownership.
Its GPS connection and iPhone or Wi-Fi requirement also make platform fit decisive: Android users should look elsewhere, such as the Withings ScanWatch 2, which supports both Android and iOS. The 42 mm rose-gold aluminum design and S/M band suit buyers seeking this specific size and finish, though band fit is personal. Choose it for Apple integration and safety features, not for long intervals between charges.
Pros:- ECG sits alongside heart-rate alerts, sleep tracking, Vitals, and possible sleep apnea and hypertension notifications.
- Fall detection, crash detection, and emergency-service connection add safety functions beyond health tracking.
- Always-on display keeps watch information visible at a glance.
- Fast charging is rated to provide up to eight hours of normal use from 15 minutes.
Cons:- Requires an iPhone or Wi-Fi for connectivity and is not the choice for Android phone owners.
- Battery life is rated for up to 24 hours of normal use, far shorter than the Withings ScanWatch 2.
- The S/M band and 42 mm case may not suit every wrist.
Best for: iPhone owners who want ECG, an always-on screen, detailed health tools, and fall and crash detection in a 42 mm smartwatch.
Not ideal for: Android users or people who want multi-day battery life without daily charging; the Withings ScanWatch 2 is a better fit for longer battery intervals.
- Model:Apple Watch Series 11
- Case size and material:42 mm rose-gold aluminum
- Band:Light Blush Sport Band, S/M
- Display:Always-on
- Connectivity:GPS; works with iPhone or Wi-Fi
- Water resistance:Up to 50 meters
- Battery life:Up to 24 hours of normal use
- Health features:ECG, heart-rate alerts, sleep tracking, Vitals app, possible sleep apnea and hypertension notifications
- Safety features:Fall detection, crash detection, emergency services connection, emergency contact notifications
Our verdict“Choose this Series 11 if you use an iPhone and value its health and safety toolkit enough to accept frequent charging.”
Samsung Galaxy Watch 8 (2025) 40mm Bluetooth Smartwatch – Graphite
The Galaxy Watch 8 is the Android-oriented choice in this group for buyers drawn to sleep tracking, heart-rate tools, and guided running. Its 40 mm size and lightweight, minimalist design are aimed at all-day wear, while the personal AI assistant offers hands-free help. Compared with the Apple Watch Series 11, it works with Android phones rather than requiring an iPhone, but the supplied details do not list ECG as a feature. That matters in a roundup focused on ECG: I would not choose it if confirmed ECG functionality is the deciding requirement.
Blood pressure monitoring is listed, but it requires a separate cuff, and full functionality depends on the Samsung Health app. It works with Samsung and other Android phones, though the product description says it works best with Samsung devices. The battery is described as improved and long-lasting, but no specific duration is provided, so buyers cannot compare its charging interval precisely with Fitbit Sense 2 or Withings ScanWatch 2.
Pros:- 40 mm lightweight design is intended for comfortable all-day wear.
- Includes sleep tracking, heart-rate features, and a Running Coach.
- Compatible with Samsung and other Android smartphones.
- Personal AI assistant supports hands-free help.
Cons:- The provided product details do not list an ECG feature, unlike the Apple Watch Series 11 and Fitbit Sense 2.
- Blood pressure monitoring requires a separate cuff.
- Full functionality requires Samsung Health, and the watch works best with Samsung phones.
- Battery life is described only as improved and long-lasting, without a specific duration.
Best for: Android users prioritizing sleep tracking, running guidance, heart-rate tools, and an AI assistant who are not buying primarily for ECG.
Not ideal for: Anyone who needs a clearly specified ECG monitor; the Apple Watch Series 11 and Fitbit Sense 2 list ECG features, while this product data does not.
- Model year:2025
- Size:40 mm
- Connectivity:Bluetooth
- Compatibility:Android smartphones, including Samsung and other Android devices
- Health features:Sleep tracking, blood pressure monitoring, heart rate, Running Coach
- Battery:Described as improved and long-lasting; duration not specified
- AI assistant:Yes
- Warranty:2 years
Our verdict“Choose the Galaxy Watch 8 for Android-focused fitness and sleep tools, but skip it if ECG is a must-have feature.”
Samsung Galaxy Watch 4 Classic 46mm Smartwatch with ECG Monitor, GPS, Fall Detection, Bluetooth, Black (Renewed)
The Galaxy Watch 4 Classic stands out for an unusually practical design detail: its rotating bezel gives buyers a tactile way to move through watch screens, alongside listed ECG, GPS, and fall detection. That combination makes it a relevant option for someone who wants ECG and navigation without relying only on touchscreen gestures. Compared with the newer Galaxy Watch 8, this model explicitly lists an ECG monitor and fall detection, while the Watch 8’s supplied details emphasize newer health and running features but do not specify ECG.
The main caution is that this is a renewed 46 mm watch, and the product data gives no battery-life figure or detailed warranty terms. Its larger case may also feel less comfortable on smaller wrists than the 40 mm Galaxy Watch 8. I’d shortlist it for buyers who value physical controls and the listed ECG features, but not for those who need predictable battery information or prefer a smaller, newer design.
Pros:- ECG monitor, GPS, and fall detection are listed features.
- Rotating bezel offers tactile navigation through the interface.
- Bluetooth connectivity supports pairing with a compatible phone.
- The ECG feature is explicitly stated, unlike in the supplied Galaxy Watch 8 details.
Cons:- Renewed condition may come with limited warranty coverage.
- Battery life is not specified in the product data.
- The 46 mm case is larger than the Galaxy Watch 8’s 40 mm size and may not suit smaller wrists.
Best for: Buyers who want a listed ECG monitor, GPS, and fall detection with tactile bezel navigation and are comfortable choosing a renewed 46 mm model.
Not ideal for: People with smaller wrists, buyers who need a stated battery-life estimate, or anyone unwilling to accept the uncertainty that can come with a renewed product.
- Size:46 mm
- Color:Black
- Condition:Renewed
- Connectivity:Bluetooth
- Health and safety features:ECG monitor; fall detection
- Navigation:GPS
- Physical control:Rotating bezel
Our verdict“Pick the renewed Watch 4 Classic if you want specified ECG and bezel controls, and can accept a large case with unclear battery details.”
Withings ScanWatch 2 Hybrid Smartwatch
The Withings ScanWatch 2 suits buyers who want ECG tracking without the look or charging routine of a conventional smartwatch. Its analog hands and stainless steel case make it a more traditional everyday watch than the Apple Watch Series 11, while its up to 35-day battery life means fewer interruptions to wear it overnight for sleep tracking. It records a 30-second ECG and tracks heart rate, sleep, and more than 40 sports, giving it broader daily-health coverage than a standalone device such as the KardiaMobile 6L.
The tradeoff is a smaller digital experience than a full smartwatch, and ECG and AFib detection require the Withings ECG App. Some personalized insights are tied to a one-month Withings+ offer. Choose it for understated styling and long battery life; skip it if you want a bright, app-forward watch or expect every insight to be included without an offer.
Pros:- Up to 35 days of battery life reduces frequent charging
- Analog hands pair with health tracking in a stainless steel case
- Tracks 30-second ECG, continuous heart rate, sleep, and more than 40 sports
- Sapphire glass offers a durable watch-face surface
Cons:- ECG and AFib detection require the Withings ECG App
- Some personalized insights are tied to a one-month Withings+ offer
- Provides a more limited digital-watch experience than the Apple Watch Series 11
Best for: Buyers who want ECG and sleep tracking in a traditional-looking watch they can wear for days between charges.
Not ideal for: Shoppers seeking a large, interactive smartwatch display or ECG access without installing the Withings ECG App.
- Case:Stainless steel
- Glass:Sapphire
- Battery life:Up to 35 days
- ECG:30-second ECG
- Heart monitoring:Continuous heart rate tracking, AFib detection, and high and low heart rate notifications
- Activity tracking:More than 40 sports, VO₂ max, and heart rate zones
- Sleep tracking:Sleep stages and breathing
- Compatibility:Android and iOS
Our verdict“Choose the ScanWatch 2 if you want ECG in a classic-looking watch with long battery life, not a full-featured touchscreen smartwatch.”
KardiaMobile 6L EKG – No Membership Required, Unlimited Recordings, HSA/FSA Eligible
The KardiaMobile 6L is the most ECG-focused option here, but it is a portable monitor rather than a watch. Its six-lead readings and 30-second rhythm analysis provide a more specialized recording experience than the wrist-based ECG on the Apple Watch Series 11 or Withings ScanWatch 2. The device can identify four rhythm results, including AFib, bradycardia, tachycardia, and normal sinus rhythm, and basic detection does not require a subscription.
That focus also defines its limits: it does not provide continuous wrist-based tracking, sleep monitoring, or workout metrics. You must use the Kardia app, and the product is not tested or recommended for people with pacemakers or ICDs. It also does not check for a heart attack or replace medical care. Pick it when recording and sharing ECG data is the priority; choose a smartwatch if you want health tracking woven into all-day wear.
Pros:- Records six-lead ECG readings in 30 seconds
- FDA-cleared rhythm analysis covers four listed arrhythmia results
- Basic heart rhythm detection requires no subscription
- Works with most smartphones and tablets
Cons:- Requires the Kardia app and a compatible smartphone or tablet
- Not tested or recommended for use with pacemakers or ICDs
- Does not check for heart attack or replace regular medical checkups
Best for: People who want a dedicated, portable six-lead ECG device for occasional recordings and sharing results with a healthcare provider.
Not ideal for: Buyers who want continuous wearable monitoring, sleep or fitness tracking, or anyone with a pacemaker or ICD.
- Device type:Six-lead personal EKG monitor
- Channels:6
- Recording time:Results in 30 seconds
- FDA-cleared:Yes
- Rhythm results:AFib, bradycardia, tachycardia, and normal sinus rhythm
- Compatibility:Most smartphones and tablets
- Subscription:No subscription required for basic heart rhythm detection
- Manufacturer:AliveCor
Our verdict“Choose KardiaMobile 6L for dedicated six-lead ECG recordings, but choose a smartwatch if you also need everyday activity and sleep tracking.”
EMAY 6L Portable ECG Monitor | Record ECG and Heart Rate in 6 Channels | Compatible with Smartphone and PC | No Subscription Required
The EMAY 6L is a practical pick for buyers who want six-channel ECG recordings stored through a phone or PC without a subscription. Unlike the Apple Watch Series 11, it is a dedicated monitor, not a watch for daily notifications, sleep scores, or workout tracking. Its Bluetooth and USB connectivity give it a different advantage over the KardiaMobile 6L: records can connect with a smartphone wirelessly or with a PC over USB, which may suit people who prefer managing data on a computer.
The product data does not list FDA clearance or specific arrhythmia classifications, so buyers seeking those stated capabilities should compare it closely with KardiaMobile 6L. It is intended for over-the-counter home use, not hospital diagnosis, and is not suitable for people with implanted pacemakers. Choose EMAY for straightforward recording and device flexibility; skip it if you need a smartwatch or a clearly specified clinical analysis offering.
Pros:- Six-channel ECG recording in a portable device
- Bluetooth connection to phones and USB connection to PCs
- No subscription required
- Rechargeable battery supports portable home monitoring
Cons:- Not suitable for people with implanted pacemakers
- Not intended as a hospital diagnostic device
- Product details do not specify FDA clearance or particular arrhythmia detection results
Best for: People who want a rechargeable, subscription-free home ECG monitor with both smartphone and PC connectivity.
Not ideal for: Buyers who need a wearable watch, hospital diagnostic equipment, stated FDA clearance, or use with an implanted pacemaker.
- Channels:6
- Connectivity:USB and Bluetooth
- Battery:Built-in rechargeable lithium battery
- Intended use:Over-the-counter
- Compatibility:Smartphone and PC
- Subscription:No subscription required
- Device type:Portable ECG monitor
Our verdict“Choose the EMAY 6L for subscription-free ECG recording across phone and PC, but not as a substitute for a smartwatch or clinical diagnostic device.”
Apple Watch Series 11 GPS Smartwatch, 46mm Jet Black Aluminum Case with Black Sport Band (M/L)
The Apple Watch Series 11 is the strongest fit for buyers who want ECG as one part of a broader, screen-based smartwatch. Compared with the Withings ScanWatch 2, it offers an always-on display, workout metrics, sleep scoring, and safety features such as fall and severe car crash detection with emergency assistance. Its ECG and heart rate alerts add heart monitoring to a device built for daily interaction, while 50-meter water resistance suits swimming and water-based routines.
The tradeoff is charging: up to 24 hours of normal use is a sharp contrast with the ScanWatch 2’s up to 35 days. Fast charging helps, but does not remove the need for frequent top-ups. This GPS model also requires an iPhone or Wi-Fi for connectivity, and some health and safety features depend on availability and setup. Choose it for an active iPhone user who values broad smartwatch functions; skip it if long battery life or Android compatibility comes first.
Pros:- ECG and heart rate alerts accompany broad health and fitness tracking
- Fall and severe car crash detection can connect with emergency assistance
- Water resistant up to 50 meters with IP6X dust resistance
- Fast charging provides up to 8 hours of normal use after 15 minutes
Cons:- Up to 24 hours of normal use means frequent charging compared with the Withings ScanWatch 2
- Requires an iPhone or Wi-Fi for connectivity
- Some health and safety features depend on availability and setup
Best for: iPhone owners who want ECG alongside workout, sleep, water-resistance, and safety features in a full-featured smartwatch.
Not ideal for: Android users or anyone who prefers long intervals between charges, since normal use lasts up to 24 hours.
- Model:Apple Watch Series 11
- Connectivity:GPS
- Case:46mm Jet Black aluminum
- Band:Black Sport Band, M/L
- Battery life:Up to 24 hours of normal use
- Fast charging:15 minutes for up to 8 hours of normal use
- Water resistance:Up to 50 meters
- Display and glass:Always-on display with scratch-resistant glass
- Dust resistance:IP6X
Our verdict“Choose the Apple Watch Series 11 if you use an iPhone and want ECG integrated with a broad smartwatch feature set, accepting daily charging.”
How We Picked
I ranked these options around the task implied by watches with ECG: making a usable heart-rhythm recording, understanding how to access it, and fitting the device into daily life. I weighed the clarity of the ECG offering, phone and regional compatibility, comfort and design, battery and charging demands, and the usefulness of other health and smartwatch functions. I also considered whether the product is a wristwatch at all; the KardiaMobile and EMAY devices are included because they offer ECG recording, but they sit below wearable watches for readers specifically seeking a watch.
That gives the Apple Watch Series 11 the lead as the strongest general smartwatch choice for compatible iPhone users, with Samsung and Fitbit options offering distinct Android and wellness alternatives. The Withings ScanWatch 2 ranks well for buyers who prize a conventional watch appearance and a less screen-centered experience. Older Galaxy Watch 4 models and duplicate Sense 2 color listings rank lower because they bring narrower or older-use-case appeal, while dedicated ECG readers make sense only for buyers willing to give up wrist-based convenience. ECG features are not a substitute for medical evaluation; I favor products whose use case a buyer can realistically understand and support.
| watches with ecg | Connectivity |
|---|---|
| Samsung Galaxy Watch 4 40mm Bl | Bluetooth, LTE, GPS |
| Fitbit Sense Health and Fitnes | — |
| Garmin Venu 4 Advanced Fitness | — |
| Fitbit Sense 2 Health and Fitn | — |
| Fitbit Sense 2 Health and Fitn | Bluetooth |
| Fitbit Sense 2 Health and Fitn | — |
| Withings ScanWatch 2 Hybrid Sm | — |
| Apple Watch Series 11 GPS 42mm | GPS; works with iPhone or Wi-Fi |
| Samsung Galaxy Watch 8 | Bluetooth |
| Samsung Galaxy Watch 4 Classic | Bluetooth |
| Withings ScanWatch 2 Hybrid Sm | — |
| KardiaMobile 6L EKG | — |
| EMAY 6L Portable ECG Monitor | | USB and Bluetooth |
| Apple Watch Series 11 GPS Smar | GPS |
Factors to Consider When Choosing Watches With Ecg
Before choosing among these ECG-capable watches, I would decide how you expect to use a reading, then check the practical details that can make a promising feature inconvenient. The category spans full smartwatches, hybrid designs, and handheld ECG readers, so the right choice depends on more than the presence of an ECG label.
Check Phone, App, and Regional Support Before the Hardware
ECG functions can depend on the companion phone, a supported app, account setup, and the country where the watch is used. A watch that pairs with your phone for notifications may still have limits on health features, so check ECG compatibility specifically rather than assuming general Bluetooth support covers it. This matters most when buying across ecosystems: Apple Watch is designed around iPhone, while Samsung and Fitbit feature availability may vary by model and setup. Confirm that the ECG app can be installed and that recorded results can be viewed or shared in the way you need. A listing title alone is not proof that a feature is enabled in your region.
Decide What You Want an ECG Reading to Do
A wrist ECG is generally meant to capture a short, user-initiated recording, not to act as continuous clinical monitoring. If you want occasional recordings that fit into a wider smartwatch routine, a wearable may be more convenient than a handheld device. If your priority is a dedicated recording workflow, a portable reader may be worth the extra step of handling it separately. Before purchase, check what the app reports, how it stores or exports recordings, and whether a clinician can use that format. Do not choose by channel count or feature labels alone; the most useful device is one whose readings and limitations you understand.
Balance Smartwatch Functions Against Battery and Screen Habits
Frequent notifications, bright displays, GPS use, and repeated health measurements can change how often a watch needs charging. A feature-rich smartwatch may be a better daily companion, but charging interruptions can make overnight wear less appealing. Hybrid watches tend to reduce screen dependence, though they may offer a different app and interaction experience. Think through your actual routine: if you remove a watch every night to charge, sleep-related tracking may be less useful to you. Battery claims also depend on settings, so compare likely use patterns rather than treating a headline estimate as guaranteed.
Choose a Form Factor You Will Wear Consistently
Case size, weight, strap material, button placement, and screen style affect comfort far more than a spec sheet suggests. A larger case may be easier to read but can feel bulky on a smaller wrist, while a classic analog-style face may look more appropriate at work than a bright touchscreen. Check the listed case size and band fit, and consider whether replacement bands are easy to source. Buyers who dislike wearing electronics overnight may prefer a conventional-looking hybrid or a separate reader used only when needed. Comfort is not cosmetic here: a device left in a drawer cannot help with routine recordings.
Treat Health Features as Tools, Not Diagnoses
ECG recordings and other watch metrics can offer useful information, but they do not replace diagnosis or urgent medical care. Read the manufacturer’s description of what the feature can and cannot detect, and learn how to save or share a result before relying on it. If you have symptoms such as chest pain, fainting, or severe shortness of breath, seek urgent care rather than waiting for a wearable reading. Buyers managing a known condition should ask their clinician whether a consumer ECG format is useful for their care. This makes the choice less about collecting the most metrics and more about using the right tool with appropriate expectations.
Pay for the Use Case, Not Just the ECG Label
Many products in this roundup pair ECG with features such as GPS, notifications, sleep insights, or stress tracking; those extras matter only if they fit your habits. If you already own a compatible smartwatch, an upgrade solely for ECG may not be worthwhile unless the feature is supported and useful to you. Likewise, a dedicated reader may offer focused recordings without giving you a screen, fitness tracking, or wrist notifications. Check whether an app account, ongoing service, or computer workflow is required, and consider the time involved as well as the purchase itself. The best value is the device that makes the recordings you need easy to access without paying for functions you will ignore.
Frequently Asked Questions
Will every ECG feature work with my phone and in my country?
No. A watch’s ECG function can depend on phone operating-system compatibility, the manufacturer’s app, and regional approval or availability. Check the exact model and your location on the manufacturer’s support pages before buying, especially if ECG is the main reason for the purchase. Also confirm that you can install the relevant app and view or export its results. General phone pairing does not guarantee that every health feature will work.
Can an ECG watch replace a medical ECG or diagnose a heart problem?
No. Consumer wearables can record limited information, but they are not a replacement for a clinician’s assessment or a diagnostic test ordered for you. A reading may be inconclusive, and a normal result does not rule out every heart issue. If you have concerning symptoms, seek medical care rather than relying on a watch. If you already have a heart condition, ask your clinician whether recordings from the specific device would be useful.
Should I choose a smartwatch or a dedicated portable ECG reader?
Choose a smartwatch if you also want wrist-based notifications, fitness tools, and a device you can wear through the day. A portable reader makes more sense if you mainly want a focused ECG recording and are comfortable taking it out, following its recording steps, and checking results through its app or computer workflow. The KardiaMobile 6L and EMAY 6L are ECG devices, not watch replacements. Compare how recordings are saved and shared, not just the number of channels or the device label.
Is a newer smartwatch automatically a better ECG choice than an older one?
Not automatically. A newer model may offer a more current smartwatch experience, but ECG support, phone compatibility, and regional availability still need to be verified for the exact device. Older models such as the Galaxy Watch 4 may remain relevant if their ECG feature works with your setup and you are satisfied with their other capabilities. Do not assume that a newer listing has a particular health feature simply because it is newer. Compare the supported ECG workflow and your phone compatibility before deciding.
Do the three Fitbit Sense 2 listings differ in ECG capability?
The listed Sense 2 options are different color combinations of the same named watch model, so the finish is the clearest stated difference among them. This roundup does not identify a special ECG advantage for one color over another. Before purchasing any listing, confirm the exact model, included band, and ECG availability for your region and phone. Choose between these listings by fit and appearance only after those compatibility checks are complete.
Conclusion
For most compatible iPhone users who want ECG within a full smartwatch, I recommend the Apple Watch Series 11 as the best overall and best premium pick in this group. Android users should start with the Samsung Galaxy Watch 8, while buyers seeking wellness features alongside ECG can compare it with the Fitbit Sense 2. The Withings ScanWatch 2 is my best fit for a traditional watch style and a less screen-focused routine; it is also a sensible starting point for beginners who prefer a simpler-looking wearable, provided ECG support is confirmed for their setup. For a focused ECG workflow rather than a watch, consider KardiaMobile 6L or EMAY 6L. The best value depends on the phone and features you already use, so I would verify compatibility and intended use before choosing an older Galaxy Watch 4 or a duplicate Sense 2 color listing.
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