If you're going to remove ads and give up on the idea of making money on the app you might consider open sourcing it. There may be others that would be interested in contributing to a mobile app.
I am considering open sourcing it. To date all of my programming / scripting projects have been entirely my own work, and I have hacked together my own version control systems I work with, so I need to take a look at learning git.
If you're using Android Studio (which you should be doing if you're using Java hint hint), then Git integration is very nice, and I would definitely consider open-sourcing it. I for one would definitely look at helping you in any way I can if there were a git open :)