Engine RPM for Android or iPhone

Engine RPM is an app that listens to the sound produced by a running engine and calculates the RPM of that engine from the sound.  It is available for on iPhone and on Android.  Engine RPM uses the same signal processing technology used in our piano and organ tuning products to extract the pitch of the running engine and then convert that pitch to an RPM.

Click here for the iPhone version.

Click here for the Android version.