Apple Watch Ultra 2 Outshines Competitors in Heart Rate Accuracy

Apple Watch Ultra 2 is proving that premium fitness trackers can combine style, durability, and precision. Data from a recent test by Rob ter Horst, a data scientist at the University of Vienna, shows that the Ultra 2 surpasses rivals like Garmin, Samsung, and Whoop in heart rate accuracy. By comparing historical fitness tracker data against his gold-standard Polar H10 chest strap, ter Horst found the Ultra 2 consistently delivered more reliable readings. For fitness enthusiasts and data-driven athletes, this sets a new benchmark for what a smartwatch can achieve.

Testing Apple Watch Ultra 2 Against Fitness Tracker Rivals

Rob ter Horst’s experiment involved running the public beta of watchOS 26 on the Apple Watch Ultra 2 and comparing it against other popular trackers. Devices like Garmin watches, Whoop MG, and Samsung wearables were included, with heart rate readings meticulously compared to Polar H10 data. The results showed that Apple Watch Ultra 2 outperformed nearly every device in accuracy, even under varied workout intensities. This demonstrates the importance of precise sensors and software optimization in wearable technology.

Why Apple Watch Ultra 2 Excels in Accuracy

Several factors contribute to the Apple Watch Ultra 2’s impressive performance. Advanced optical heart sensors, improved algorithms, and tight integration with watchOS 26 ensure readings are consistently closer to true values. Unlike some competitors that may lag during high-intensity activity, the Ultra 2 maintained accuracy across multiple scenarios. This makes it a reliable choice for athletes who require dependable data to track performance, recovery, and overall health metrics.

What This Means for Fitness Tracker Buyers

For anyone considering an upgrade or looking for the most precise wearable, Apple Watch Ultra 2 emerges as a clear frontrunner. Its combination of rugged design, long battery life, and now proven heart rate accuracy sets it apart from Garmin, Whoop, and Samsung. Whether you’re a casual fitness enthusiast or a serious athlete, the Ultra 2 provides confidence that your health and performance data is trustworthy, helping you make smarter workout and recovery decisions.