Which app uses my GPS I have discovered battery drain and it is caused by GPS but I don't understand how is that possible when my location is turned off and location permission is denied for every app installed and also any app I use don't need gps. I don't have any unfamous or pirated apps installed, and didn't get any new apps since 5 days, and problem started today. So is there any way to see which app is using gps since here is just blank name..?
Go to setting--> Location 

Then you will see list of recent apps who requested location.
If you are still seeing apps there who is using location service then you can find which app is using your location service .