Compare the real device heading with a filtered heading. Tune for a steady needle when still and a fast response when you turn.
01 · Sensor input
Use Start sensor on your phone. iPhone users may be asked to allow motion/orientation access. The page must be served over HTTPS (or localhost).
0°
—Sensor source
—Observed updates/s
—Last reading age
02 · Live comparison
N = magnetic/true north as reported by device
RAW
—
FILTERED
—
—Raw ↔ filtered gap
—Raw turning speed
0Recorded samples
—Auto filter state
03 · Filtering mode
Auto defaults to raw on stable sensors, lightly damps stationary jitter, and snaps back to raw during turns. Other modes remain for comparison. The sliders affect manual modes only.
04 · Test session
Try: hold steady for ten seconds, rotate slowly through north, turn 180° quickly, then stop. Export readings and settings for comparison on different devices.