I was very interested in the thumbnail of this post so I did a little digging and found this: The PDF to the Paper where the whole picture is
Life_inst_bad
That would be "accepting the premise of assholes" as Louis Rossman would say.
Grayjay is also a option if you want to avoid the ads. Eddit* spelling changed from Gayjay to Grayjay
Wild theory: could it have been malicious compliance? Maybe the dev got a written notice to do it that way from some incompetent manager.
The App (Drip) gives you after about 3 months acurate times on when the period should start. If you want accurate fertility tracking your girlfriend will have to measure her basal temperature (ar best daily) and either look out for changing cervical mucus or change in cervix opening/hardness.
I am glad I finally got my wife use this Foss alternative instated of some garbage that sends your data to a proprietary server.
The short awnser is: https://wiki.lineageos.org/devices/ The m8 also wasn't supported anymore but since mine will mostly/only be used for media playback (you know, great speakers) so security isn't my bigest concern.
Well basicly all instruction you need and it's explained pretty well on the lineage os website itself. https://wiki.lineageos.org/devices/m8/ The hardest part was getting the unlocktoken since htc doesn't take new htcdev registrations. I got hellped by a member on Lemmy who had a old htc dev account.
"Seal downloader" from the Playstore and "Seal" from F-Droid are 2 very different apps. One is a a clone riddled with ads, the other one is FOSS goodness. You are free to guess which is which.