BeatCheck analyzes audio input live to estimate the tempo in beats per minute (bpm)!
Best app on App Store for fast and precise bpm recognition!
Live tempo display for musicians like drummers and DJs mixing with vinyls.
Simply open the app and use either internal or external microphone/line-in (e.g. to connect to your mixers cue channel using a simple headset adapter).
Also available on MacOS as a neat status bar app!