On the sides I have been making a small health records app that stores data in #emacs #orgmode files and attachments. No cloud, subscription, or sharing of data with any third party provider, unless you explicitly do that by sharing your files.

It was primarily for personal uses and is not yet feature complete and the UX is not optimal, but is still usable in ways.

Here is the documentation https://docs.lepisma.xyz/harp/

F Droid builds are available here https://f-droid.org/packages/xyz.lepisma.harp in case you want to try it out and give feedback.