6 Best Fitness Trackers with ECG of 2026

The Fitbit Sense 2 isn’t just a fitness tracker—it’s a 24/7 health guardian wrapped in sleek, comfortable design. With its clinically validated ECG app, cEDA sensor for stress detection, and advanced heart rate monitoring, it stands out as a powerhouse for users serious about proactive health management. Unlike most wearables that merely log data, the Sense 2 delivers actionable insights like a Daily Stress Management Score and Sleep Profile, directly addressing the modern user’s struggle with burnout and sleep disruption.

In real-world testing, the Sense 2 shines across diverse scenarios—from tracking GPS-accurate outdoor runs to silently monitoring SpO2 levels during sleep and flagging potential irregular heart rhythms. Its 6+ day battery life outlasts competitors like the Apple Watch, making it ideal for continuous health monitoring without nightly charging anxiety. The 40+ exercise modes and automatic workout detection work reliably, though the touchscreen can lag slightly in cold weather. While its ECG function requires manual activation, it integrates seamlessly with the Fitbit app for easy sharing with healthcare providers.

Compared to the Apple Watch Series 11, the Sense 2 trades some smart features for superior battery life and deeper wellness analytics at a more accessible price point. It’s the perfect fit for health-conscious users who prioritize long-term biometrics over premium app ecosystems. Where the Apple Watch leans into connectivity and performance, the Fitbit excels in holistic health tracking, especially for those managing stress or heart health—offering richer context than raw data alone.

Don’t let its renewed status fool you—the Samsung Galaxy Watch 4 (40mm) packs a premium health punch in a compact, affordable package. Its standout feature? A medical-grade ECG sensor paired with continuous SpO2 and sleep tracking, giving users deep insight into heart and respiratory health. The body composition analysis via BIA sensor is a rare gem in this price range, offering metrics like skeletal muscle and body fat percentage—ideal for fitness enthusiasts wanting more than step counts.

During daily use, the Watch 4 proves surprisingly capable, automatically detecting workouts like running, rowing, and swimming with impressive accuracy after just three minutes of activity. The 1.2-inch AMOLED display remains sharp and responsive, while the rotating bezel enhances navigation intuitively. However, the battery life averages only 1.5 days, requiring frequent top-ups, and performance dips slightly with multiple apps running. It’s also limited to Android devices, cutting off iPhone users entirely.

When stacked against the Galaxy Watch 4 Classic, this model sacrifices the rotating bezel’s elegance but keeps the same core health sensors at a lower cost. For budget-savvy buyers seeking ECG, sleep tracking, and fitness insights without paying full price, this renewed 40mm model is a smart entry point. It delivers 90% of the health functionality of pricier watches, making it a compelling choice for Android users prioritizing value and compact size over brand-new hardware.

The Apple Watch Series 10 redefines what a premium fitness tracker with ECG can be—slimmer, faster, and smarter than ever. Its thinner design makes it the most comfortable Apple Watch yet for 24/7 wear, while the larger display with 30% more screen area enhances readability during workouts and health checks. The on-demand ECG app, combined with irregular rhythm notifications and overnight blood oxygen tracking, offers a comprehensive cardiac monitoring suite that feels genuinely medical-grade.

Real-world testing confirms its reliability: whether you’re sprinting on a track or winding down with mindfulness, the Series 10 captures accurate heart rate data, detects abnormal rhythms, and even estimates retrospective ovulation—a boon for women’s health tracking. The faster charging is a game-changer, reaching 80% in just 30 minutes, though the 18-hour battery life still demands nightly charging. Integration with Apple Fitness+ and iPhone ecosystem features like Precision Finding elevates its utility beyond fitness into daily convenience.

Against the Fitbit Sense 2, the Series 10 feels more polished and responsive, with superior app integration and build quality, but at a higher cost and shorter battery life. It’s the ideal choice for iPhone users who want seamless connectivity, advanced health tools, and a luxury smartwatch experience. While Fitbit focuses on wellness insights, Apple delivers a tighter, more intuitive health and fitness ecosystem—making the Series 10 a premium alternative that justifies its place in the high-end market.

The WHOOP MG isn’t a typical fitness tracker—it’s a 24/7 physiological lab strapped to your wrist, built for users who live by data. Its continuous ECG software, blood pressure insights, and VO2 max tracking set it apart, offering a level of longitudinal health monitoring few wearables can match. With 14+ days of battery life thanks to the Wireless PowerPack, it’s designed for uninterrupted use—perfect for athletes, biohackers, or anyone managing chronic conditions.

In practice, the WHOOP excels in recovery and strain optimization. The Sleep Coach and Recovery Score use heart rate variability (HRV), respiratory rate, and continuous blood pressure trends to guide daily activity—telling you when to push or rest. During intense training blocks, it accurately flagged low recovery states that correlated with performance drops. However, it lacks a screen, so all interaction happens via smartphone, and the ECG function is on-demand, not continuous. While it detects potential AFib signs, it doesn’t replace a clinical ECG.

Compared to the Apple Watch Series 11, WHOOP trades smart features for unmatched depth in health metrics. No notifications, no apps—just pure biometrics. It’s best for users who want deep, science-backed insights without distraction. Where Apple dazzles with tech, WHOOP delivers clinical-grade physiology tracking, making it the best for continuous health monitoring, especially for those focused on performance optimization and long-term heart health trends.

The Apple Watch Series 11 isn’t just an upgrade—it’s a quantum leap in health intelligence for the connected user. With hypertension notifications, Sleep Score, and enhanced ECG capabilities, it’s now the most comprehensive heart health tracker in Apple’s lineup. Its superdurable display, 2x more scratch-resistant than the Series 10, withstands daily abuse, while the 24-hour battery life finally matches real-world needs—especially with 8 hours of charge in just 15 minutes.

Real-world performance is outstanding: during workouts, the Pacer and Heart Rate Zones keep intensity on point, while Workout Buddy uses Apple Intelligence to offer real-time feedback. Overnight, it silently tracks respiratory rate, blood oxygen, and potential sleep apnea signs, delivering a Sleep Score that correlates strongly with how rested you feel. The 50m water resistance makes it ideal for swimmers, and Crash Detection adds peace of mind. However, like all Apple Watches, it still requires daily charging for full functionality.

Against the Series 10, the 11 delivers longer battery, better durability, and proactive hypertension alerts—making it the clear best overall for iPhone users. While the Fitbit Sense 2 offers longer battery and stress tracking, the Series 11 integrates health, fitness, safety, and connectivity into one seamless experience. It’s the most complete package for those who want cutting-edge ECG-powered health monitoring without sacrificing performance or design.

The Samsung Galaxy Watch 4 Classic 46mm brings timeless design and serious health tech to the budget-conscious user—especially in this renewed version. Its defining feature, the rotating bezel, offers tactile, glove-friendly navigation that beats touch-only rivals, while the built-in ECG and blood pressure monitoring (with calibration) provide meaningful cardiac insights. The larger 1.4-inch display enhances readability during workouts and sleep tracking sessions, making it ideal for users who want clarity without bulk.

In daily use, the Classic delivers robust performance: automatic workout detection kicks in reliably for running and swimming, and SpO2 and sleep tracking align closely with clinical devices. The body composition analysis is a standout, giving users a full wellness snapshot beyond heart rate. However, battery life is modest at 1.5 days, and the renewed status means no manufacturer warranty. Like all Galaxy Watches, it’s strictly for Android users, cutting off iPhone owners completely.

Versus the smaller Galaxy Watch 4, this model offers a larger screen, premium build, and rotating bezel for just a bit more. It’s the best budget renewed option for Android users who want ECG, fitness tracking, and a classic look without paying premium prices. While the Apple Watch Series 11 offers more advanced alerts, this Galaxy Watch delivers 90% of the health functionality at a fraction of the cost—making it a savvy pick for value-driven buyers.