Quadrant Challenge

Specify which quadrant of an angle lies on as soon as possible!
20 angles would show during the game, counting the total time used.
Time limit currently is 1200 seconds.
If specifying incorrectly or the app is put into the background, then player loses, and result is not counted.
There are 4 modes:
1° - 360°
361° - 720°
0.01 rad - 6.28 rad
6.29 rad - 12.56 rad

Note: Support url:https://nwithntogether.wixsite.com/apps, which contains important notes such as Terms and Conditions of this app, read before downloading the app.