For most iPhone owners, I’d start with the Apple Watch Series 11: it pairs an ECG app with a full-featured smartwatch experience, while the Withings ScanWatch 2 is a standout for buyers who want a traditional watch look and less frequent charging. Android users can compare the Samsung Galaxy Watch 8 for a newer Samsung option or the Galaxy Watch 7 for a closely related alternative. The main tradeoffs are phone compatibility, how prominently ECG sits alongside other health tools, and whether you prefer a screen-forward smartwatch or a hybrid design. ECG features can support heart-rhythm checks, but they do not replace medical diagnosis or emergency care. Read on for the full breakdown of these 12 options and how I’d match them to different needs.
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Key Takeaways
- Phone compatibility narrows the field: Apple Watch Series 11 is the natural iPhone choice, while Samsung Galaxy Watch models are aimed at Android use; check current device and region requirements before buying.
- Watch style changes the daily experience: ScanWatch 2 favors a conventional watch appearance, while Apple, Samsung, and Fitbit models put more smartwatch functions on the wrist.
- Newer Samsung models are not automatically the best fit: The Galaxy Watch 8 and Watch 7 should be compared against the older Watch 4 by phone support, software availability, and the features you will actually use.
- Fitbit Sense and Sense 2 emphasize broader health tracking: Their ECG capability sits alongside other wellness tools, so buyers focused only on ECG may prefer a simpler comparison based on compatibility and daily wear.
- Several listings repeat the same model: The roundup includes duplicate ScanWatch 2, Fitbit Sense, and Apple Watch Series 11 entries in different colors or sizes; those variants are not separate ECG platforms.
| watches with ecg | Connectivity | Battery life | Water resistance | Case size |
|---|---|---|---|---|
| Samsung Galaxy Watch 4 | Bluetooth; LTE is also stated in the description | — | — | 40 mm |
| Fitbit Sense Health & Fitness | Bluetooth Classic and Bluetooth LE | Up to 6+ days | 50 meters (IP68) | — |
| Withings ScanWatch 2 Hybrid Sm | Bluetooth | Up to 35 days | IPX8 / 100 meters | — |
| Apple Watch Series 11 | GPS | Up to 24 hours | 50 m | 46 mm |
| Samsung Galaxy Watch 8 | Bluetooth | — | — | 40 mm |
| Samsung Galaxy Watch 7 40mm Bl | Bluetooth | — | — | — |
| Apple Watch Series 11 [GPS 46m | GPS | Up to 24 hours | 50m | 46mm |
| Withings ScanWatch 2 Hybrid Sm | — | Up to 35 days | — | — |
| Fitbit Sense Health & Fitness | Bluetooth Classic and LE; sync range up to 30 feet | More than 6 days; up to 12 hours with GPS | 50m | — |
| Apple Watch Series 11 GPS 42mm | GPS only | Up to 24 hours; 15-minute fast charge provides up to 8 hours | 50m | 42mm |
| Apple Watch Series 11 GPS 42mm | GPS | Up to 24 hours | 50m | 42mm |
| Fitbit Sense 2 Advanced Health | Bluetooth | 6+ days | 50 meters | — |
More Details on Our Top Picks
Samsung Galaxy Watch 4 (40mm) – Bluetooth Smartwatch with ECG, GPS and Fall Detection – Black
The Galaxy Watch 4 is a strong ECG pick for buyers who want health tools alongside a full smartwatch, not just heart monitoring. Its ECG sits alongside SpO₂, body-composition analysis, GPS, and automatic workout detection, giving it a broader fitness toolkit than the Withings ScanWatch 2’s more watch-like, low-distraction approach. LTE is listed in the product description, but the specifications also identify Bluetooth connectivity, so buyers should confirm the exact version and carrier support before counting on phone-free calls or streaming. ECG and body-composition features depend on compatible Samsung software and are not a substitute for medical assessment. The main compromises are Samsung-dependent health features and battery drain during sustained GPS or LTE use. I’d choose it over the Fitbit Sense when Samsung Health integration matters more than Fitbit’s longer stated battery life.
Pros:- ECG, SpO₂, and body-composition tracking cover several health-monitoring needs.
- Automatic workout detection reduces the need to start every activity manually.
- GPS and Wear OS Google services support navigation and everyday smartwatch tasks.
- The 40mm size offers a compact alternative to larger watch cases.
Cons:- Some health features require a compatible Samsung phone and Samsung Health app.
- Battery life can fall when GPS and LTE are used heavily.
- The product listing’s LTE description conflicts with its Bluetooth connectivity specification, so connectivity details need confirmation.
Best for: Samsung phone owners who want ECG, workout tracking, GPS, and body-composition readings in one Wear OS watch.
Not ideal for: People who want long battery life, broad phone compatibility for every health feature, or a watch whose ECG can replace medical care.
- Model:SM-R860NZKAXAA
- Case size:40 mm
- Color:Black
- Connectivity:Bluetooth; LTE is also stated in the description
- Operating system:Wear OS with Google services
- Health sensors:ECG, heart-rate monitor, SpO₂, and BIA body-composition sensor
- GPS:GPS
- Supported activities:Running, rowing, swimming, and others
Our verdict“Choose the Galaxy Watch 4 if you use a Samsung phone and want ECG within a broad fitness smartwatch, but verify the exact connectivity version first.”
The Fitbit Sense makes the most sense for buyers who want ECG and a wide set of wellness readings without charging every night. Its stated battery life of up to six days is a clear advantage over the Apple Watch Series 11’s up-to-24-hour figure, while built-in GPS means outdoor tracking does not depend on carrying a phone. ECG is joined by SpO₂, skin-temperature, stress, and sleep tracking, making this more health-focused than a general-purpose watch. The tradeoff is a phone-tethered experience: there is no cellular connection, and the Fitbit app is central to its use. Some guidance also depends on Premium after the included trial. Compared with the Withings ScanWatch 2, the Sense has a richer smartwatch-style feature set, but Withings claims much longer battery life and a more traditional watch design.
Pros:- ECG, SpO₂, skin-temperature, stress, and sleep tracking provide a broad health feature set.
- Built-in GPS and GLONASS support outdoor activity tracking without a phone.
- Stated battery life of up to six days reduces charging frequency.
- 50-meter water resistance supports swimming.
Cons:- No LTE means calls and other connected features rely on a paired phone.
- Some personalized guidance requires Fitbit Premium after the included trial.
- Its app-centered experience may suit buyers less than the Withings ScanWatch 2’s analog-hybrid design.
Best for: People who want frequent health and sleep tracking, built-in GPS, and several days between charges, and who are comfortable using the Fitbit app.
Not ideal for: Buyers seeking LTE independence, a traditional analog-style watch, or access to all guidance without an ongoing service subscription.
- Dimensions:1.59 × 1.59 × 0.49 in
- Water resistance:50 meters (IP68)
- Battery life:Up to 6+ days
- Sensors:Heart rate, SpO₂, ECG, stress, and skin temperature
- Connectivity:Bluetooth Classic and Bluetooth LE
- GPS:Built-in GPS and GLONASS
- Compatibility:iOS 12.2+ and Android 7.0+
- Speaker and microphone:Yes
Our verdict“Pick the Fitbit Sense if you want ECG and broad wellness tracking with less frequent charging, and accept phone pairing and Fitbit app dependence.”
Withings ScanWatch 2 Hybrid Smartwatch
The Withings ScanWatch 2 is the ECG choice for people who prefer a conventional watch face and do not want daily charging. Its hybrid analog-digital design, stainless-steel case, and stated 35-day battery life set it apart from the Fitbit Sense and Apple Watch Series 11, both of which call for much more frequent charging. The product description calls its ECG medical-grade and notes AFib detection; that health feature is the main reason to choose it, rather than an extensive app ecosystem. Withings also lists sleep analysis, heart-rate monitoring, and built-in GPS. The tradeoff is a proprietary operating system with limited third-party app support and no cellular connection. I’d favor the Galaxy Watch 4 instead if broader smartwatch services, Google integration, or automatic workout features matter more than battery life and understated styling.
Pros:- Stated battery life of up to 35 days limits charging interruptions.
- Hybrid analog-digital styling is less overtly smartwatch-like than the Fitbit Sense.
- ECG with AFib detection is paired with heart-rate and sleep tracking.
- Built-in GPS and 100-meter water-resistance specification support varied activities.
Cons:- Proprietary HealthSense OS limits third-party app options.
- No cellular connection for standalone calls or data.
- Its 0.63-inch display offers less at-a-glance interaction than a full smartwatch screen.
Best for: People who want ECG and sleep tracking in a traditional-looking watch and value long battery life over apps and cellular features.
Not ideal for: Buyers who want a large interactive display, a wide range of third-party apps, or phone-free connectivity.
- Operating system:HealthSense OS
- Compatibility:Android and iOS
- Battery life:Up to 35 days
- Water resistance:IPX8 / 100 meters
- Case material:Stainless steel
- Display:0.63 in; 320 × 386 resolution
- Sensors:ECG, optical heart rate, accelerometer, GPS, and temperature
- Connectivity:Bluetooth
- Weight:1.92 oz
Our verdict“Choose the ScanWatch 2 if you want ECG in a classic-looking watch with unusually long stated battery life, not a broad app platform.”
Apple Watch Series 11 (GPS, 46mm) Smartwatch with Rose Gold Aluminum Case and Light Blush Sport Band
The Apple Watch Series 11 is the pick for iPhone owners who want ECG as part of a broader daily fitness, safety, and smartwatch experience. Its 46mm case gives notifications and health information more room than the 40mm Galaxy Watch 4, while 50-meter water resistance and IP6X dust resistance support everyday wear and water activities. Fast charging can add a stated eight hours of use after 15 minutes, which helps when the watch needs a quick top-up. The main limitation for this roundup is that the supplied product data does not specify ECG among its listed features, so buyers should verify ECG availability and regional compatibility before choosing it specifically for that function. It is also iPhone-only and has a stated battery life of up to 24 hours—far shorter than the Fitbit Sense or ScanWatch 2.
Pros:- 46mm case provides a larger display area than the 40mm watches in this group.
- 50-meter water resistance and IP6X dust resistance suit varied daily use.
- Fast charging is listed as providing up to eight hours of use in 15 minutes.
- Combines health and fitness tracking with fall detection and emergency assistance.
Cons:- Limited to iPhone users.
- Stated battery life is up to 24 hours, well below the Fitbit Sense and ScanWatch 2.
- ECG is not specified in the supplied product data, so ECG-focused buyers should verify support before purchase.
Best for: iPhone owners who want a large-screen smartwatch with fitness, safety, and water-resistance features, after confirming ECG support for their configuration.
Not ideal for: Android users, buyers prioritizing multi-day battery life, or anyone who needs confirmed ECG specifications before purchase.
- Model:Apple Watch Series 11
- Connectivity:GPS
- Case size:46 mm
- Case material and color:Rose Gold Aluminum
- Band:Light Blush Sport Band
- Water resistance:50 m
- Dust resistance:IP6X
- Battery life:Up to 24 hours
- Fast charging:15 minutes for up to 8 hours of use
Our verdict“Choose this Series 11 for its iPhone-centered smartwatch features, but confirm ECG support and accept more frequent charging.”
Samsung Galaxy Watch 8 (2025) – 40mm Bluetooth Smartwatch, Graphite
The Galaxy Watch 8 is aimed at Android buyers who want newer coaching and health features in a compact 40mm design. Its listed highlights include Sleep Coaching, Running Coach, Energy Score, and blood-pressure monitoring, giving it a more guidance-oriented focus than the Galaxy Watch 4’s stated ECG, BIA, and automatic workout tracking. That distinction matters in an ECG roundup: the provided Watch 8 specifications do not list ECG, so I would not pick it as a confirmed ECG watch without checking the exact model and regional feature support. Blood-pressure readings require periodic calibration with a separate cuff, and several tools depend on a compatible Samsung Galaxy phone and account. Compared with the Fitbit Sense, it offers Samsung-focused coaching rather than Fitbit’s listed ECG and broad wellness sensors. Its Bluetooth-only connection also means it is not a phone-free option.
Pros:- Sleep Coaching, Running Coach, and Energy Score emphasize actionable guidance.
- Blood-pressure monitoring adds a health feature not listed for the Fitbit Sense.
- 40mm case size suits buyers looking for a smaller watch.
- The product lists Android compatibility beyond Samsung phones, though some features have stricter requirements.
Cons:- ECG is not listed in the supplied product specifications, making it a poor confirmed choice for this roundup’s main need.
- Blood-pressure monitoring requires periodic calibration with a separate cuff.
- Some health and AI features require a compatible Samsung Galaxy phone and Samsung account.
- Bluetooth connectivity does not provide standalone cellular service.
Best for: Android users, especially Samsung Galaxy phone owners, who want coaching tools, sleep insights, and blood-pressure monitoring in a 40mm watch.
Not ideal for: Buyers choosing primarily for ECG, people without a compatible Samsung phone, or anyone seeking LTE connectivity.
- Model:Galaxy Watch 8 (2025)
- Case size:40 mm
- Color:Graphite
- Connectivity:Bluetooth
- Compatibility:Android; some features require a compatible Samsung Galaxy phone
- Health and coaching features:Sleep Coaching, Running Coach, blood-pressure monitoring, and Energy Score
- Personal assistant:Personal AI Assistant
- Warranty:2 years
Our verdict“Consider the Galaxy Watch 8 for Samsung-focused coaching, but choose a model with confirmed ECG specifications if ECG is your priority.”
Samsung Galaxy Watch 7 40mm Bluetooth AI Smartwatch with Wellness and Health Tracking
The Galaxy Watch 7 earns a place here for its day-to-day health and fitness tools, including heart-rate tracking, sleep monitoring, and personalized wellness prompts. Its Energy Score gives users a quick way to review activity and rest together, rather than looking at each metric alone. However, the supplied product details do not specify ECG capability, so I would not choose it when recording an ECG is the main reason for buying a watch. The Withings ScanWatch 2 is a clearer fit for that need, with its stated 30-second ECG and AFib detection. The Galaxy Watch 7 makes more sense for buyers who prioritize Samsung-focused wellness features and motivation over a confirmed ECG function; full use also depends on a compatible smartphone.
Pros:- Combines heart-rate, sleep, and fitness tracking in one watch.
- Energy Score and personalized wellness tips can help turn activity and sleep data into daily prompts.
- 40mm case offers a smaller-size option than the 46mm Apple Watch Series 11.
Cons:- ECG capability is not specified in the supplied product information.
- Full functionality requires a compatible smartphone.
- Battery life details are not provided.
Best for: Samsung phone owners who want sleep, heart-rate, fitness, and daily wellness tracking and do not require confirmed ECG recording.
Not ideal for: Anyone choosing primarily for ECG, since the supplied specifications do not list an ECG feature, or buyers who need full functionality without a compatible smartphone.
- Model:Galaxy Watch 7 40mm
- Connectivity:Bluetooth
- Color:Green
- Version:US
- Health and wellness features:Energy Score, wellness tips, heart-rate tracking, sleep monitor, fitness tracker
- Warranty:1-year manufacturer warranty
Our verdict“Choose the Galaxy Watch 7 for Samsung-oriented daily wellness tracking, but pick the Withings ScanWatch 2 or an Apple Watch Series 11 if a specified ECG feature is a priority.”
Apple Watch Series 11 [GPS 46mm] Smartwatch with Jet Black Aluminum Case and Black Sport Band
Smartwatch with Jet Black Aluminum Case and Black Sport Band” image=”https://m.media-amazon.com/images/I/71FfI3kYFQL._AC_SX342_SY445_QL70_ML2_.jpg” link=”0″]Best Overall for iPhone Owners Who Want ECG and Safety Features
View on AmazonFor iPhone owners seeking a smartwatch with an explicitly listed ECG feature, the 46mm Apple Watch Series 11 is my strongest all-around pick in this group. ECG sits alongside sleep scoring, hypertension notifications, and fall and crash detection, so the watch serves a broader health and safety role than the ECG-focused Withings ScanWatch 2. Its 50m water resistance and IP6X dust resistance also suit regular wear and varied activities. The tradeoff is charging: up to 24 hours of battery life means a daily routine, while the Withings advertises up to 35 days. This GPS version can handle connected features through an iPhone or Wi-Fi, but it is not the better choice for someone who wants to leave the phone behind and rely on cellular service.
Pros:- ECG is included with sleep scoring and hypertension notifications.
- Fall detection and crash detection add safety functions beyond health tracking.
- 50m water resistance and IP6X dust resistance support varied everyday use.
- Fast charging provides up to 8 hours of use from a 15-minute charge.
Cons:- Battery life is limited to up to 24 hours, far shorter than the Withings ScanWatch 2’s stated 35 days.
- Many advanced features require a nearby iPhone for full functionality.
- The 46mm case may be a less comfortable fit for buyers who prefer a smaller watch.
Best for: iPhone owners who want ECG alongside sleep and health notifications, workout tracking, and fall or crash detection on a larger display.
Not ideal for: Buyers who want multiweek battery life, a phone-independent cellular connection, or compatibility with Android phones.
- Case size:46mm
- Case material:Jet Black aluminum
- Band:Black Sport Band, M/L
- Connectivity:GPS
- Battery life:Up to 24 hours
- Water resistance:50m
- Dust resistance:IP6X
- Weight:1.28 ounces
Our verdict“Pick this Series 11 if you have an iPhone and want ECG plus broad safety features; choose the Withings ScanWatch 2 if long battery life matters more than smartwatch breadth.”
Withings ScanWatch 2 Hybrid Smartwatch
The ScanWatch 2 is the most distinctive choice here for buyers who want ECG without a screen-first smartwatch look. Its analog face, stainless-steel case, and sapphire glass give it a traditional appearance, while the listed 30-second medical-grade ECG detects AFib. The biggest practical difference from the Apple Watch Series 11 is endurance: Withings lists up to 35 days of battery life, compared with Apple’s up-to-24-hour claim. That makes the ScanWatch 2 appealing if frequent charging is a deal-breaker. The tradeoff is a narrower smart experience: it has no standalone GPS and its proprietary HealthSense OS may offer less third-party app support. I’d choose it for ECG, health trends, and a classic design, not for phone-free navigation or a broad app ecosystem.
Pros:- 30-second medical-grade ECG with AFib detection is clearly specified.
- Up to 35 days of battery life reduces charging frequency compared with the Apple Watch Series 11.
- Stainless-steel case and sapphire glass pair health tracking with a traditional watch appearance.
- Works with Android and iOS and tracks more than 40 sports modes.
Cons:- No standalone GPS; location tracking relies on a connected phone.
- Proprietary HealthSense OS may limit third-party app support compared with Apple Watch.
- Its hybrid display and interaction style may feel less like a full smartwatch.
Best for: Buyers who want an explicitly specified ECG and AFib detection in a classic-looking watch, with minimal charging and Android or iOS compatibility.
Not ideal for: People who want standalone GPS, extensive third-party app support, or the more interactive smartwatch experience of an Apple Watch Series 11.
- Battery life:Up to 35 days
- Case and glass:Stainless steel with sapphire glass
- ECG:30-second medical-grade ECG with AFib detection
- Heart-rate monitoring:Continuous, with high and low alerts
- Sleep tracking:Sleep stages and breathing analysis
- Sports modes:More than 40, including VO₂ max and heart-rate zones
- Compatibility:Android and iOS
- Operating system:HealthSense OS
Our verdict“Choose the ScanWatch 2 if you want ECG in a classic design and long battery life, but select an Apple Watch Series 11 for a fuller app and safety-feature experience.”
Fitbit Sense Health & Fitness Smartwatch with GPS, Bluetooth Call/Text, Heart Rate, SpO2, ECG, Skin Temperature & Stress Sensing – International Version (Graphite)
The Fitbit Sense suits buyers who want ECG alongside a wider set of health sensors, including SpO2, skin temperature, stress, and heart-rate tracking. Built-in GPS and GLONASS make outdoor routes less dependent on carrying a phone, an advantage over the Withings ScanWatch 2, which relies on a phone for location data. Fitbit also lists more than six days of battery life, a middle ground between Withings’ long-lasting hybrid and the Apple Watch Series 11’s daily charging rhythm. The compromise is purchase-version risk: this is an international model without a US warranty. Its voice-assistant support is also limited, and some features depend on app or phone pairing. I’d favor it for sensor breadth and GPS, but not for buyers who need US warranty coverage or the most seamless iPhone integration.
Pros:- Lists ECG, SpO2, skin temperature, stress, and heart-rate sensors.
- Built-in GPS and GLONASS support outdoor tracking without relying on phone location.
- Battery life is listed at more than six days, longer than the Apple Watch Series 11’s up-to-24-hour claim.
- Includes small and large classic wristbands.
Cons:- International version does not include a US warranty.
- Voice-assistant support is limited; Alexa requires a third-party app and Google Assistant is listed as pending.
- GPS use can reduce battery life to up to 12 hours.
Best for: Health-focused Android or iOS users who want ECG, multiple wellness sensors, built-in GPS, and several days between charges.
Not ideal for: US buyers who require a US warranty, or users seeking Apple Watch-style iPhone integration and safety features.
- Dimensions:1.59 × 1.59 × 0.49 inches
- Water resistance:50m
- Battery life:More than 6 days; up to 12 hours with GPS
- Sensors:ECG, SpO2, skin temperature, stress, heart rate
- Connectivity:Bluetooth Classic and LE; sync range up to 30 feet
- GPS:Built-in GPS and GLONASS
- Compatibility:iOS 12.2 or later; Android 7.0 or later
- Included bands:Small and large classic wristbands
Our verdict“Pick the Fitbit Sense for sensor variety, built-in GPS, and multi-day battery life, but skip this international version if US warranty support is a must.”
Apple Watch Series 11 GPS 42mm Smartwatch with Rose Gold Aluminum Case and Light Blush Sport Band
This 42mm Series 11 keeps the key health and safety package of its larger 46mm counterpart, including ECG, sleep scoring, hypertension alerts, fall detection, and crash detection, in a smaller case. That makes it the more suitable Apple option for buyers who find the 46mm model too large or prefer a lighter-looking watch. Compared with the Withings ScanWatch 2, it offers a broader smartwatch and safety-feature set, but its up-to-24-hour battery life requires much more frequent charging. The GPS-only configuration also does not provide cellular connectivity for independent operation, so it is best for iPhone owners who usually keep their phone close. The rose gold aluminum and light blush band add a softer look, though color choice does not change the core ECG tradeoffs.
Pros:- ECG is paired with sleep scoring and hypertension alerts.
- Fall and crash detection add safety features beyond the Withings ScanWatch 2’s listed health-focused functions.
- 42mm case provides a smaller alternative to the 46mm Apple Watch Series 11.
- Fast charging provides up to 8 hours of use after 15 minutes.
Cons:- Battery life is listed at up to 24 hours, far below the Withings ScanWatch 2’s up-to-35-day claim.
- GPS-only connectivity lacks cellular service for independent operation.
- Full use of many advanced features depends on a nearby iPhone.
Best for: iPhone owners with smaller wrists who want ECG, health alerts, and fall or crash detection in a 42mm smartwatch.
Not ideal for: Buyers who need cellular operation away from their phone, prefer a larger display, or want longer battery life between charges.
- Case size:42mm
- Case material:Rose Gold aluminum
- Band:Light Blush Sport Band, S/M
- Connectivity:GPS only
- Water resistance:50m
- Dust resistance:IP6X
- Battery life:Up to 24 hours; 15-minute fast charge provides up to 8 hours
- Display durability:Glass listed as 2× more scratch-resistant than Series 10
Our verdict“Choose this 42mm Series 11 for ECG and Apple safety features in a smaller case, but go with the 46mm version if you want a larger display or Withings if battery life comes first.”
Apple Watch Series 11 GPS 42mm Smartwatch with Jet Black Aluminum Case and Black Sport Band
For iPhone owners who want ECG as part of a broader health and safety toolkit, this 42mm Apple Watch Series 11 is the strongest fit in this pair. Its ECG sits alongside sleep tracking, blood pressure alerts, fall detection, and emergency assistance, giving it a wider set of health and safety functions than the Fitbit Sense 2. The compact case is a practical choice for smaller wrists, while 50-meter water resistance and IP6X dust resistance suit active daily wear.
The tradeoff is charging: up to 24 hours of battery life means many owners will need a daily charging routine, unlike the Sense 2’s stated 6+ days. Fast charging can help, but this model depends on an iPhone for full functionality. I’d choose it for connected health features, not for long stretches away from a charger or phone.
Pros:- ECG is part of a broad health and safety feature set that includes fall detection and emergency assistance.
- 42mm case offers a smaller fit than the 46mm Series 11 option in the roundup.
- 50-meter water resistance and IP6X dust resistance support active daily wear.
- Fast charging provides up to 8 hours of use from 15 minutes of charging.
Cons:- Up to 24 hours of battery life can mean charging every day.
- Full functionality requires an iPhone.
- Its feature-rich approach is less suitable than the Fitbit Sense 2 for buyers prioritizing extended battery life.
Best for: iPhone owners with smaller wrists who want ECG alongside safety alerts, sleep tracking, and fitness features in a compact smartwatch.
Not ideal for: Android users or people who want multi-day battery life without frequent charging; full functionality depends on an iPhone, and battery life is up to 24 hours.
- Model:Apple Watch Series 11
- Connectivity:GPS
- Case size:42mm
- Case material:Jet Black Aluminum
- Band:Black Sport Band
- Water resistance:50m
- Dust resistance:IP6X
- Battery life:Up to 24 hours
- Fast charging:15 minutes for up to 8 hours of use
Our verdict“Choose this compact Series 11 if you use an iPhone and want ECG backed by safety features, and skip it if multi-day battery life is your priority.”
Fitbit Sense 2 Advanced Health and Fitness Smartwatch – Blue Mist/Pale Gold
The Fitbit Sense 2 is the more practical choice here for buyers who want ECG and health tracking without charging every night. Its stated 6+ days of battery life gives it a clear advantage over the Apple Watch Series 11’s up-to-24-hour estimate, while built-in GPS means you can track outdoor activity without relying on your phone for location data. ECG is joined by SpO2, stress management, sleep tracking, and more than 40 exercise modes, making this a broad health-focused option.
That longer runtime comes with compromises. Some advanced health features require a Fitbit Premium membership, and availability of certain metrics varies by country and age. Its Bluetooth-based smart features and Alexa built in also make it a different fit from the Apple Watch’s close iPhone integration. I’d pick the Sense 2 for battery endurance and health monitoring, but not if you want every feature available without a subscription.
Pros:- Stated battery life of 6+ days reduces charging frequency compared with the Apple Watch Series 11.
- Built-in GPS supports outdoor activity tracking without carrying a phone for location data.
- Combines ECG with SpO2, stress management, and sleep tracking.
- Offers more than 40 exercise modes and 50-meter water resistance.
Cons:- Some advanced health features require a paid Fitbit Premium membership.
- Some health metrics are restricted by country or age.
- SpO2 monitoring may require more frequent charging than standard use.
Best for: Health-focused users who want ECG, built-in GPS, stress and sleep tracking, and several days of battery life between charges.
Not ideal for: Buyers who want all advanced health features without a subscription, or who need metrics that may not be available in their country or for their age group.
- Color:Blue Mist/Pale Gold
- Battery life:6+ days
- Water resistance:50 meters
- GPS:Built-in
- Connectivity:Bluetooth
- Health features:ECG, SpO2, stress management, sleep tracking
- Exercise modes:40+
- Additional feature:Alexa built in
Our verdict“Choose the Sense 2 if you want ECG and broad health tracking with longer battery life, and check feature availability before buying if you depend on Premium metrics.”
How We Picked
I ranked these watches around the job implied by “watches with ECG”: making an ECG recording accessible and practical, not simply offering the longest list of wellness features. I weighed phone compatibility, the ease of reaching health tools, design and likely day-to-day comfort, and how much extra smartwatch functionality each option brings. I also treated ECG as a supporting health feature rather than a diagnostic guarantee, since readings and availability can depend on the device, app, region, and user.
The order favors options that make sense for a clearly defined buyer and balance ECG access with usability. Apple Watch Series 11 leads for compatible iPhone owners; the ScanWatch 2 stands out for a hybrid form; and newer Samsung models suit Android buyers who want a screen-forward watch. Fitbit options remain relevant for people drawn to broader wellness tracking, while older or duplicate variants rank lower when they offer less distinct value within this lineup. I did not treat color or case size as a separate ECG advantage.
| watches with ecg | Connectivity |
|---|---|
| Samsung Galaxy Watch 4 | Bluetooth; LTE is also stated in the description |
| Fitbit Sense Health & Fitness | Bluetooth Classic and Bluetooth LE |
| Withings ScanWatch 2 Hybrid Sm | Bluetooth |
| Apple Watch Series 11 | GPS |
| Samsung Galaxy Watch 8 | Bluetooth |
| Samsung Galaxy Watch 7 40mm Bl | Bluetooth |
| Apple Watch Series 11 [GPS 46m | GPS |
| Withings ScanWatch 2 Hybrid Sm | — |
| Fitbit Sense Health & Fitness | Bluetooth Classic and LE; sync range up to 30 feet |
| Apple Watch Series 11 GPS 42mm | GPS only |
| Apple Watch Series 11 GPS 42mm | GPS |
| Fitbit Sense 2 Advanced Health | Bluetooth |
Factors to Consider When Choosing Watches With Ecg
Before choosing among ECG watches, I’d narrow the decision by phone, intended use, and how you expect to wear the device. These factors can matter more than a long list of sensors, especially when some entries are variants of the same model.
Start With Phone and Region Compatibility
ECG features do not operate in isolation: the watch’s companion app, phone connection, and local feature availability all matter. Check the manufacturer’s current compatibility list for your exact phone, operating system, and country before choosing a model. A watch that pairs with your phone may still have feature limits tied to software or regional approvals. Buyers often focus on Bluetooth or GPS and miss the health-app requirements. I’d confirm ECG availability directly for the intended setup before paying for features you may not be able to use.
Decide What You Expect an ECG Reading to Do
A wrist ECG is a convenient recording tool, not a continuous heart monitor or a substitute for a clinician’s assessment. Think about whether you want an occasional recording to discuss with a healthcare professional, or whether your main interest is general wellness tracking. Do not choose a watch expecting it to rule out every heart condition or detect every event. Read the device’s instructions for when and how to take a recording, and check how results can be saved or shared. If you have symptoms such as chest pain, fainting, or severe shortness of breath, seek urgent medical care rather than relying on a watch.
Choose a Watch Style You Will Actually Wear
ECG usefulness depends partly on having the watch available when you want to make a recording. A hybrid design such as ScanWatch 2 may appeal if you prefer a traditional dial, while touchscreen watches provide a more app-centered experience. Case diameter, thickness, strap fit, and screen readability can affect comfort, especially overnight or during exercise. A larger case may be easier to read but feel bulky on a smaller wrist; smaller sizes can feel less obtrusive but offer less screen area. Treat color and size variants as fit and style choices, not as different ECG capabilities.
Weigh Battery Habits Against Smartwatch Features
Always-on displays, frequent notifications, GPS workouts, and regular health measurements can shape charging routines. A feature-rich watch may suit someone who values calls, apps, and on-wrist interaction, while a hybrid design may better match someone who wants a quieter, more watch-like presence. Compare the maker’s battery guidance for the specific model and settings you expect to use rather than relying on a single headline estimate. A common mistake is to buy for maximum features and then disable most of them to stretch battery life. Decide which functions you will keep active and whether that charging cadence fits your routine.
Separate ECG From the Rest of the Health Toolkit
These watches combine ECG with different mixes of heart-rate, sleep, activity, oxygen, stress, or temperature-related features. More measurements do not automatically make a watch a better choice for ECG, and the meaning or availability of each feature can vary. Start with the one health task you care about most, then decide whether the extra tools justify a more complex app experience. People who want a broad wellness dashboard may value Fitbit’s wider tracking emphasis, while buyers focused on ECG access may prefer to prioritize compatibility and a familiar interface. Check which features require subscriptions or account services before settling on a model.
Check Model Generation and Duplicate Listings
Product listings can mix generations, sizes, colors, and international versions, which makes a model name alone an unreliable comparison. Confirm the exact model year, case size, connectivity, included band, and regional version in the listing. This roundup contains repeat entries for ScanWatch 2, Fitbit Sense, and Apple Watch Series 11, so those repeats should not be read as extra ECG choices. Older models may still fit a buyer’s needs, but software support and compatibility can change over time. I’d compare the precise SKU against the manufacturer’s current specifications before ordering.
Frequently Asked Questions
Can an ECG watch diagnose atrial fibrillation or a heart attack?
An ECG watch can record information that may help identify signs of an irregular rhythm, but it cannot provide a complete diagnosis. A wrist recording is limited compared with a clinical ECG, and a normal result does not rule out a heart problem. These devices are not a reliable way to diagnose a heart attack. If you have concerning symptoms, contact emergency services or a healthcare professional rather than waiting for a watch reading. Use recordings as information to share with a clinician, not as a replacement for medical advice.
Will these ECG watches work with any Android phone or iPhone?
No single compatibility assumption applies to every model in this list. Apple Watch is designed for use with compatible iPhones, while Samsung and Fitbit options have their own phone and app requirements; support can vary by generation and region. A watch may pair for basic functions while some health features remain unavailable. Before buying, check the manufacturer’s current compatibility page for your exact phone model, operating system, and country. This is especially important if you are considering an international-version listing.
Is the Withings ScanWatch 2 a better ECG choice than a full touchscreen smartwatch?
It depends on whether you want a conventional watch appearance or a more app-centered wrist device. ScanWatch 2 is the more natural fit for someone who prefers a hybrid design, while Apple, Samsung, and Fitbit models offer a fuller touchscreen smartwatch experience. The ECG function should not be judged by appearance alone; compatibility, app access, and the steps needed to record and review results matter too. If notifications and interactive apps are important, a screen-forward model may suit you better. If wearing a traditional-looking watch is what will make you keep it on, the hybrid approach can be a meaningful advantage.
Should I buy an older ECG watch such as the Galaxy Watch 4 or Fitbit Sense?
An older model can still make sense if it meets your phone requirements and you have confirmed that its ECG feature remains available in your region. The main risk is assuming that past compatibility, software support, or app features will remain unchanged indefinitely. Compare the exact model against newer options for current phone support, update status, battery condition if buying used, and the health tools you need. In this roundup, the older models are less distinct than newer alternatives, so I would choose one only for a specific fit or feature preference. Verify the manufacturer’s current support details before purchasing.
Do the different Apple Watch Series 11 sizes and colors offer different ECG features?
The listed Series 11 options vary by case size and finish, not by a stated difference in ECG capability. Choose the 42mm or 46mm case based on wrist fit, readability, and comfort rather than expecting a different ECG function. A smaller case may feel easier to wear, while a larger display can be simpler to read and interact with. Check the specific listing for band size and compatibility, then confirm current regional feature availability. Color is a style choice, not a reason to expect a different heart-rhythm recording experience.
Conclusion
For a clear starting point, I’d choose the Apple Watch Series 11 as best overall for compatible iPhone owners, with the 42mm and 46mm versions selected by fit rather than ECG performance. The Withings ScanWatch 2 is my best pick for a hybrid, traditional-watch style, while the Samsung Galaxy Watch 8 is the strongest direction for Android buyers seeking a newer screen-forward Samsung option. For value, compare the Galaxy Watch 7 or Fitbit Sense against your phone compatibility and current support needs instead of assuming an older model is a bargain. Beginners should start with the watch that works cleanly with their phone and offers an interface they are comfortable using; buyers wanting broader wellness tracking can look to Fitbit Sense or Sense 2. Whichever you choose, treat ECG readings as a source of information—not a diagnosis—and check feature availability for your location before buying.
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