Yeah, I actively develop this in my spare time. Take a look at Reckoner/app: Privacy first personal financial tracker - Codeberg.org. Right now I’m focused on add in-app tutorials instead of links to the documentation (currently not up to date). After that I’m planning on changing the synchronization service from Pocketbase to PowerSync and look a deploying an end-to-end encrypted cloud offering for synchronization. I am starting to get requests from people using the app and prioritize addressing those in-between big feature releases.
I have a couple of ideas for smaller enhancements if you want to dip your toes into dev.