[ISO] Privacy-first health tracker (Sleep & Menstrual Cycle) - 100% Local / No Cloud?
Hi everyone,
I’ve spent the last few weeks falling down the rabbit hole of health trackers, and honestly? I’m exhausted. It feels like every time I find a device with decent sensors, it comes with a mandatory cloud account or a "premium" subscription just to see my own data.
I’m looking for the "Privacy Unicorn" for two specific things: high-quality sleep tracking and skin temperature sensing (I need this for basal body temp/cycle tracking).
My needs:
- 100% Local storage: I want my data to stay on my phone, period. I can use Gadgetbridge and I’m looking for something that plays nice with it (or any FOSS alternative).
- No Screen (if possible): I just want a "set it and forget it" vibe for day and night. I don't need another glowing rectangle in my life.
- No Subscription: I refuse to rent my own heartbeat.
I’ve looked into the Oura (too much cloud), Whoop (subscription hell), and Tempdrop (great for cycle, but limited for sleep/local). I'm hearing rumors about the Garmin Cirqa and the Amazfit Helio Strap, but has anyone actually managed to get something like this running in a "de-googled" or air-gapped way?
Is there a hidden gem I’m missing? Or maybe a way to "lobotomize" a mainstream tracker so it only talks to my phone and never to the mothership?
Any leads would be life-saving. Thanks!