RPM is a speed measurement app which uses image processing algorithms to detect the speed of Fidget Spinner in rpm ( rounds per minute ). In order to get accurate measurement you need to do the following steps.

1 - Cut a piece of aluminium foil.
2 - Warp it around a leave.
3 - Try to keep the red circle of the camera in
the middle of the Fidget Spinner.

Spin your Fidget Spinner and press start.
Measure the spinning duration and compete agains your friends!
Share the results on Facebook!