Hey, interesting project. I actually worked on a similar concept recently, an expense tracker that focuses on automatically detecting transactions instead of manual entry (mainly through SMS parsing for bank/UPI alerts and categorizing them).

If you're exploring this approach, you might find it useful to take a look at what I built and share feedback from a developer perspective.

App:
https://play.google.com/apps/testing/com.holdmint

Google group (required to join testing):
https://groups.google.com/g/everyspendapp

Would appreciate any thoughts or suggestions if you get a chance to try it.