Tempo Widget - Measures the tempo of music in beats per minute
Version: 1.0Tap the button in time with a song. The light on the button indicates how accurate the measurement is. (Red is bad, green is good.)
Operating System: Mac OS X
Once you have an accurate measurement, you can double-click on the digits to set the tempo in iTunes.
When you want to measure another song, just start tapping the button again.