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Get Magnetic Counter old version APK for Android
Magnetic field counter. RPM Meter. Works in a combination with a magnet.
Count and measure everything what rotates.
1) Attach magnet to a rotating disk
2) Put the phone close by
3) Count every time when magnet passes the phone
Ideal for DIY wind turbine projects when making coils or need to count RPM's
Press & Hold on screen to change magnetic field margin.