Settings
A web page can't change Spotify's volume. To make the music quieter than the engine: push this up, then lower the phone volume. For a real per-app balance on Samsung: Good Lock → Sound Assistant → individual app volume.
On iPhone, turning this off makes the engine ignore the silent switch but pauses Spotify.
How much acceleration counts as full throttle.
How late your phone's GPS speed is. Tune until "fit" in Diagnostics is highest.
Sensor fusion
Speed — last 30 s
Forward acceleration used by the fusion (m/s²)
Blue should follow the orange dots smoothly and lead them slightly; that lead is the GPS latency being hidden.
Diagnostics
Accelerometer raw, gravity removed (m/s², phone axes)
Bars span ±5 m/s². "Forward" is the raw reading projected on the learned driving direction (0 until calibrated).
- Location permission
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- Motion permission
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- GPS
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- GPS speed (raw)
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- Motion sensor
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- Accel with gravity (x/y/z)
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- Calibration
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- Forward accel
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- Accel bias
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Mount the phone so it can't move, keep this page open with the screen on, and play the sound through the car over Bluetooth. Calibration happens automatically during the first minute of driving.