Precise compass app with support for magnetic and true north
Additionally, this compass shows the magnetic field strength, which is helpful when searching for interferences. The precision of the compass sensor can be adjusted in the settings. Moreover, this compass is optimized for high resolution displays.
To make sure this compass is accurate, calibrate the sensors in your device and keep it away from magnetic fields. Furthermore, when using this compass hold your device flat to the ground with the display facing the sky, like you would with a mechanical compass.