Brilliant!

I use this app. I mean i actually use this every day. Other apps are a chore for me. This is No fuss, i own other HRV apps and straps and receivers - this app and the others in the bundle are great value. The data seems as accurate as any other i have used. Support for my questions has been excellent. Check you health - buy this app.

Run better faster stronger about HRV4Training, v5.1.2