10 Best ECG Watches 2026 in the United States

The Garmin Instinct® 3 GPS Smartwatch offers a solid mix of features tailored for outdoor enthusiasts. The battery life is impressive, lasting up to 18 days, which is excellent for those who spend extended periods outdoors without access to charging facilities. The 1.2” AMOLED display ensures vibrant visibility, crucial for clear reading in different lighting conditions. Compatibility is solid, supporting Bluetooth, Wi-Fi, and USB connectivity, which means it can pair with most modern devices.

Additional health features like advanced sleep monitoring and Pulse Ox are useful for keeping track of wellness. The built-in flashlight adds convenience, proving useful in low-light conditions. However, the smartwatch may be bulkier and heavier at 53 grams, which might not be comfortable for all users especially during intense activities. The Garmin OS is functional but might not have as many apps as other ecosystems like Apple or Android.

The Garmin Instinct® 3 is a robust choice for outdoor and fitness enthusiasts who need a durable smartwatch with long battery life and comprehensive health tracking features.

The Fitbit Sense 2 is designed as a comprehensive health and fitness smartwatch, offering strong ECG capabilities with its ECG app to detect atrial fibrillation and irregular heart rhythms. Its stress management tools, including continuous stress detection and mindfulness content, add value for users interested in mental well-being. The watch also provides detailed sleep tracking with personalized profiles and smart wake features, which can help improve sleep quality. Battery life is quite good, lasting over six days on a charge, meaning less frequent charging hassle. Comfort-wise, the design is lightweight and includes two band sizes, making it suitable for all-day wear.

The built-in GPS supports outdoor activity tracking, and 40+ exercise modes cover most fitness routines. Connectivity is solid with Bluetooth for calls, texts, notifications, and integration with Alexa and Google services. Additional health sensors like SpO2 and 24/7 heart rate monitoring further enhance its health insights. The watch also offers durable water resistance up to 50 meters, making it suitable for swimming.

Some features like Google Maps are limited by platform and timing, and the smartwatch may feel a bit complex initially for users new to wearables. Fitbit Premium membership adds personalized insights but requires a subscription after a trial period. The Fitbit Sense 2 is well suited for users seeking an all-around health-focused watch with strong ECG and stress tracking, balancing comfort and smart features, although beginners might need some time to get accustomed to it.

The Garmin fēnix 8 is a premium multisport GPS smartwatch that also offers ECG functionality, making it a solid choice for active individuals who want health tracking along with robust sports features. Its 1.3-inch AMOLED display is bright and clear, housed in a durable stainless steel bezel that’s resistant to water up to 40 meters — so it’s great for swimming and even diving. The watch’s battery life is impressive, lasting up to 10 days in regular use and 28 hours with GPS active, which is above average for smartwatches with advanced features like ECG.

The ECG app can record your heart rhythm and screen for atrial fibrillation, which is helpful for basic heart health monitoring, although it's important to note this is not a medical device and availability depends on your region. Alongside ECG, it offers continuous heart rate tracking, sleep analysis, oxygen saturation (Pulse Ox), respiration tracking, and stress monitoring, providing a broad picture of your wellness. This makes it a good health companion for those focused on fitness and general well-being.

Connectivity options like Bluetooth, Wi-Fi, and USB ensure seamless syncing with your smartphone for notifications, calls, and even voice commands, including some offline controls. This enhances ease of use, especially when on the move. The watch also includes handy extras such as a built-in LED flashlight and multi-band GPS with advanced sensors for outdoor navigation. Weighing 66 grams and featuring a Whitestone band, it offers comfort for extended wear, though its stainless steel and rugged design may feel bulky for some. Designed primarily for athletes and adventurers, it provides reliable ECG and health tracking alongside excellent battery life and outdoor capabilities, making it ideal for users who want detailed sports and navigation tools rather than just simple ECG functionality.