In your Google Developer Console, you will be able to track your Android app usage.
1 - Log into your Google Developer Console account
You can login using this link: https://play.google.com/console/
2 - Select your app from the list of available apps
3 - Navigate to the Statistics tab in the left-hand menu
4 - Usage information
Under the “Statistics” area you can find your app usage details, you can change the period as well as the metrics using the different options on that page: