This app doesn't work with HTC M8 under Android V5. It crashes when motors are starting exactly like a previous version of DJI app before DJI developers resolve the bug. 10 € and cannot use it :(
DJI app and PFV booster work fine with same firmware.
Idem, I don't see why you need this mod. The wheel with the new remote controller allows you to adjust the speed.
Here a video-test with Pv2+ V2 and the new remote controller:
https://www.youtube.com/watch?v=dgcbb0aJ_AU
No prop gards for me. I often notice the issue when I fly around my house. Maybe something perturbs the compass there. When I have a clear field it flies perfectly. I think it depends a lot where we calibrate the compass.