How to read your Ultrahuman Ring HRV

We have not verified from Ultrahuman’s own pages which HRV formula or time window its app uses, so we do not label it here.

Scores that combine several signals are the maker’s own algorithm; look at the HRV and resting heart rate underneath them.

HRV type: Not confirmed from official pages.

Compare a night with your own usual range over the last weeks, not with another person or another device. A single low night is most often a reaction to something specific — a short night, alcohol, an infection, stress or hard training. Several days below your range together with a higher resting heart rate and feeling unwell are a reason to rest.

Scores such as Readiness, Recovery, Nightly Recharge or HRV Status are each maker’s own algorithm. Two devices on the same night can show different HRV numbers because they measure at different times and with different formulas; neither is “wrong”.

We have not found an official public developer API from Ultrahuman, so we cannot offer a direct connection.

Through Apple Health

We have not confirmed that Ultrahuman writes HRV to Apple Health, so we do not promise that your Ultrahuman HRV will appear in ONDA. If your device is not Apple Watch, ONDA can still measure your pulse with the iPhone camera, along with a breathing-rate estimate. The camera gives pulse, not HRV.