A free app for Android, by DevApps.

RPM Meter is a simple, handy tool for measuring the speed of a rotating machine, such as an electric motor, an electric fan, or a compressor. It is a useful tool for anyone who needs to measure the speed of their machine in order to diagnose the problem, check the quality of the drive, and determine the appropriate speed for the machine.

RPM Meter works on many different kinds of machines, including electric motors, electric fans, and compressors.

The tool is very easy to use, and it has a simple interface that makes it easy to measure your machine’s speed.