@Egika I am not against the feature. I used the recovery test on Ambit3 quite a bit. And I used to test my HRV quite a bit using a standalone app. But it is tricky to get an accurate HRV measurement even with a chest HRM if the strap is dirty or doesn’t have a very good conductivity with skin, and I remember having a lot of issues with Suunto’s unreliable chest HRM, which often produced very noisy HRV readings. Anyway, considering that this feature can easily be obtained with a 3rd party app it is fairly low on my list of priorities.