Pitch listens through your microphone and tells you which note you're playing and how sharp or flat you are — for tuning a guitar, violin, voice or any instrument. The needle sits in the middle when you're in tune. Audio is analysed live on your device and never recorded or sent anywhere.

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The note is found by detecting the pitch of the incoming sound (using autocorrelation) and comparing it to standard concert pitch, A = 440 Hz. Background noise or very quiet playing can make the reading jump; play one clear, sustained note for the steadiest result. Nothing is recorded — the sound is analysed and discarded frame by frame. Everything runs on your device.