There are two main reasons why the Qibla may not be working correctly:
a) The compass is not properly calibrated;
Incorrect compass calibration – You may need to recalibrate the compass by making a "figure eight" motion in the air.
b) Metal interference;
(e.g., metal cases). Metal interference (e.g., magnetic cases and nearby objects). These can disrupt the phone's native compass function, which, in turn, leads to an incorrect Qibla reading.
Here are some steps to help you resolve this issue (try in order):
Remove all (metal) cases and accessories from the phone.
Even if you don't think this is the cause of your problem, this step can help rule out a very common factor.
Force stop and reopen the app.
This will help "reset" the Qibla.
Try a "figure eight" recalibration.
Draw a figure eight in the air to recalibrate the Qibla.
Restart the phone.
Delete and reinstall the MAWAQIT app (rare circumstances).