It all started with me wanting to measure my HRV and I tried many different apps but wasn't really impressed, either they came with an expensive subscription or they had a very cluttered interface, and the PPG (photoplethysmography (using the camera)) wasn't that accurate IMHO. A wearable like a smartring or a wristwatch would probably been better but I didn't wanna buy one...

So I started to build my own and it has been an interesting experience, I have been reading a lot about HRV, RR intervals and how to use the baevsky method for figuring out a stress index, fascinating reading.

Drift helps you understand your current capacity by looking at BPM, HRV, SI and amount of sleep per night. Without a wearable one have to manually start tracking sleep but it has a smart feature and will stop tracking after first unlock in the morning (it waits 2 hours for late night scrollers to make sure you're sleeping)

I didn't find any good open source apps for this so hopefully Drift gets some traction for the ones interested.

I'm a strong believer in OSS and I think users will like the openness of being able to see what's going on, and the convenience of getting it at the Play Store for a low price (no subscriptions or hidden fees).

GitHub (MIT open source): https://github.com/cladam/drift Play Store: https://play.google.com/store/apps/details?id=com.ilseon.dri...

Thanks for checking it out.