This just gives the raw data from the phone’s gyroscope, which is a rotation rate in rad/s.

The experiment “Magnetic field” just gives the raw data from the phone’s magnetometer. On most phones you can switch between calibrated and uncalibrated data in the menu.

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Set up a bunch of magnets as marker, so you can use this experiment to measure the speed and distance while moving along these magnets.

Calculates and displays the FFT of magnetometer data. The strongest frequency is given as well.