answered by anonymous
I don't think you need an app. I think you just go to settings and check storage space (measured in GB or KB)
...
https://play.google.com/store/apps/details?id=com.radioopt.widget ...
https://play.google.com/store/apps/details?id=com.netqin.mobileguard ... https://play.google.com/store/apps/details?id=com.onavo.android ...
