The Verdict
The accuracy benchmark. If you want the most precise HRV data and don't mind taking deliberate morning readings, the Polar H10 paired with a good app is hard to beat. Best value for serious tracking.
Pros
- Gold standard ECG accuracy
- Works with almost any app
- Long battery life
- One-time purchase
Cons
- Must wear chest strap for readings
- Not comfortable for 24/7 wear
- Requires deliberate measurement sessions
- Strap can wear out over time
Why ECG is More Accurate
ECG (electrocardiography) measures the actual electrical signals of your heart, while PPG measures blood volume changes optically. ECG captures the precise timing of each heartbeat with minimal noise, making it the reference standard for HRV. Studies show PPG devices can read 6-11% lower than ECG—the Polar H10 avoids this limitation entirely.
Recommended Apps
The H10 works with virtually any app that supports Bluetooth heart rate monitors. Top choices include Elite HRV, HRV4Training, and Polar's own apps. This flexibility is a major advantage over locked ecosystems.
/filters:quality(90)/fit-in/600x600/coros-v2/images/pace3-2308/pace3_img@2x.png)
