Ever want to create counters which can count anything from the years, months and days since your anniversary? How about birthday? Or how long you've had your car for.
You can also count down until a date and once it arrives, the counter will begin counting up.
Counters can be reset, for scenarios such as "time since I last replaced the water filter". When reset, the counter will resume.
If you are running Android 6.0+ (marshmallow and beyond), this app will back itself up and restore itself automatically.
This project is open source MIT licensed. I wasn't satisfied with any of the solutions, paid or free that were out there, so I made this and made it free and open source.
Feel free to contribute and suggest things:
https://github.com/sreich/android-count-the-days