Quickly after launch, I discovered that many people could not install the app because they were running an older android version. Since then I've improved support for older android devices, added several smaller features and did some smaller UI improvements. I've also built a small website (http://timesheetapp.xyz/), so you can find the app when looking for "timesheet app" at google.
The app is currently downloaded at ~100 devices, but not really growing. However the existing users are all very happy with the app. I'm very happy with it aswell as it's solving the problem I have very well (built it primary to solve my own problem of time tracking).
If you have any idea on how to better promote the app, let me know :)