Recovery scores, HRV, load: plenty of numbers circulate around these topics, and very little context. The pages below explain how such a number comes about, what it can tell you — and where it stops being useful.
LeibFit is an iPhone app that calculates recovery, sleep and load from the data of the watch you already wear, and turns that into a strength training plan. Everything runs on the device. Every value is guidance for your training, not a medical diagnosis.
HRV app for iPhone, no extra hardware
The Apple Watch measures SDNN, not RMSSD. What that means for your numbers and why the trend matters more than the absolute value.
Read →Whoop alternative: Amazfit band on iPhone
Why your Amazfit Helio Strap data is missing in the morning – and how LeibFit reads the band directly over Bluetooth, without going through the Zepp app.
Read →Workout app without an account
What “runs entirely on your iPhone” actually means – including the honest downside: no cross-device sync, no web login.
Read →What you will not find here
No copy-and-paste training plans, no nutrition advice and no health counselling. LeibFit is not a medical device: it does not detect illness, does not diagnose anything and does not replace a doctor. If something about your numbers worries you, the right address is a medical practice — not an app.
Recovery, sleep and load from the watch you already wear — training plan included.
iPhone · iOS 17.6+ · 7 days free, no subscription