The GymAware Power Tool is the only LPT that uses angle measurement to correct non vertical lifts. For details on on this feature, check out the angle fact sheet and this explanation on angle.
There are two simple steps required to set up for angle.
1. Ensure that Angle measurement is turned on in settings.
2. Zero angle when prompted.
Turning Off Angle
If you are using a smith machine, a pin loaded weight stack or other exercise where you don’t require angle, you can can eliminate the need to zero the angle sensor by tuning off angle measurement in settings.