A free app for Android, by Andrea Martignano.
RPM Speed & Wow is an application that allows you to get an idea of the speed of a vinyl record, which is handy if you want to get a better idea of how fast your vinyl record is playing. The app allows you to either look at the speed of your turntable or measure the average speed, min/max variations, and wow value.
To use this app, you need a device with a built-in microphone and a spinning vinyl disc.
If you want to get the best results, you need to place your device as close as possible to the center of the turntable and make sure that the phone is not damaged.
