Oh great, I didn't realise HRV is also easily accessible via HealthKit: https://developer.apple.com/documentation/healthkit/hkquantitytypeidentifier/2881127-he

Oh great, I didn't realise HRV is also easily accessible via HealthKit: https://developer.apple.com/documentation/healthkit/hkquantitytypeidentifier/2881127-heartratevariabilitysdnn https://developer.apple.com/documentation/healthkit/hkquanti... I really like the audio on TBA. Would love to hear feedback on my app, if possible, especially if you're using another breathing app regularly. It is quite a different approach, partly because hopefully it will be used to quantify breathing function one day.