☀ The sun needle shows the sun's actual position in the sky, calculated from your GPS coordinates and the current time.
Turn your device until the sun aligns with the actual sun — The dotted line now represents the True North | True South line.
Tap the compass to overlay the magnetic sensor needle (red/white). Tap again to return to solar only.
The M/T switch toggles between Magnetic North (M) and True North (T) for the red/white needle. The badge shows the current mode and declination.
The sensor uses WMM2020 declination. Damped with low-pass filter (α = 0.05).
No magnets needed for the solar method. True geometry.