Hey!
I'm launching Earleaf tomorrow an audiobook player for Android built for local files. The feature I'm most excited about is Page Sync: you take a picture of a page from your physical book (or e-book) and the app jumps to that position in the audio. Wrote up how it works under the hood here: https://earleaf.app/blog/a-deep-...
This is a really clever idea — the page sync feature stands out immediately.
Love that it runs fully on-device too. That combination of privacy + practical usefulness makes a lot of sense.
Also impressive that this is your first Android app and a solo project. Upvoted, and best of luck with the launch 🚀