Re:FTC Settlement with Fertility-Tracking App for Facebook/G...
by zaq1 on Wednesday January 13, 2021 @11:38PM
(#25772096)
I would recommend Drip, which is available on F-Droid. FOSS with very minimal permissions. I'd suggest checking it for trackers with ClassyShark (also on FD).
https://f-droid.org/packages/com.drip
Screenshots feature a modern looking UI.