Best 2025 Smartwatches for ECG functionality

#1 Apple Watch Series 11
4.8

The ECG feature receives strong support from a reviewer’s real family example where on-watch ECG readings caught an irregular rhythm missed elsewhere.

Pros: battery life, value for money

Cons: coaching features, recovery insights

#2 Garmin Venu 4
4.5

The ECG feature received limited but positive opinionated evidence, with one reviewer saying the wrist measurement worked reliably.

Pros: battery life, GPS accuracy

Cons: value for money, voice assistant quality

#3 Google Pixel Watch 4
4.5

ECG was treated as a valuable health and safety tool when reviewers discussed the health feature set.

Pros: battery life, charging speed

Cons: band quality, button controls

#4 Samsung Galaxy Watch Ultra (2025)
4.5

ECG is treated positively as part of Samsung Health Monitor’s useful health-tool set rather than as a deeply tested medical feature.

Pros: battery life, display quality

Cons: value for money, antioxidant index

#5 Samsung Galaxy Watch 8
4.4

ECG functionality was viewed as dependable and easy to use, with reviewers noting accessible readings and clear reports.

Pros: comfort, voice assistant quality

Cons: battery life, antioxidant index

#6 Coros Apex 4
4.0

The ECG-based Wellness Check is praised as a useful manual HRV reading option rather than a full medical ECG feature.

Pros: GPS accuracy, battery life

Cons: display quality, brightness

#7 Garmin Forerunner 970
4.0

ECG was generally seen as a meaningful premium health addition, though reviewers stressed it is manual, sometimes a hassle to enable, and not continuous monitoring.

Pros: heart rate accuracy, GPS accuracy

Cons: battery life, value for money

#8 OnePlus Watch 3
2.6

ECG was a major regional caveat: reviewers liked or valued the feature where available, but repeatedly criticized its absence in the US or North America.

Pros: battery life, button controls

Cons: size options, ECG functionality

#9 Amazfit Active 2
2.5

Reviewers noted the lack of ECG as an expected limitation for this price rather than a surprising omission.

Pros: value for money, battery life

Cons: band quality, button controls

#10 Apple Watch SE 3
2.1

ECG was the most repeated missing health feature, often framed as the main reason some higher-risk buyers might step up to the Series line.

Pros: display quality, value for money

Cons: ECG functionality, battery life

#11 Garmin Instinct 3
2.1

ECG functionality is a clear omission because reviewers criticize Garmin for using the older sensor platform without ECG support.

Pros: battery life, display quality

Cons: mapping and navigation, smartwatch features

#12 Garmin Vivoactive 6
1.9

ECG is a clear limitation because reviewers repeatedly note that the Vivoactive 6 lacks ECG support compared with higher-end Garmin models.

Pros: battery life, comfort

Cons: heart rate accuracy, sleep tracking accuracy

#13 Garmin Venu X1
1.8

ECG was a repeated omission: multiple reviewers called its absence strange, frustrating, or a major gap at this price.

Pros: display quality, comfort

Cons: battery life, value for money

#14 Garmin Forerunner 570
1.6

ECG functionality was one of the most criticized omissions because the Gen 5 sensor made reviewers expect ECG at this price.

Pros: heart rate accuracy, GPS accuracy

Cons: value for money, mapping and navigation

#15 Amazfit T-Rex 3 Pro
1.5

ECG functionality is a weakness because reviewers explicitly flagged ECG as missing or something that might put buyers off.

Pros: battery life, value for money

Cons: mapping and navigation, user interface

#16 Amazfit Balance 2
1.0

ECG functionality was a clear missing feature in reviews that compared the Balance 2 with higher-end watches or listed absent health tools.

Pros: battery life, value for money

Cons: third-party app support, onboard music storage