Don't frequently calibrate your gimbal unless there is unusual phenomenon such as spin, drift, swing and so on.
Two methods of calibration:
Calibration on PC (remember to install the driver first!!)
Calibration on app
You can choose anyone you like
Software downloads:
MOZA Air: https://www.gudsen.com/moza-air-downl...
MOZA AirCross: https://www.gudsen.com/moza-aircross-...
Feel free to contact [email protected] if the tutorial can't solve your problem.