Most interfaces use a needle or "indicator bar" that turns green when in tune, red when flat (low), and blue or yellow when sharp (high). 🎼 Chord Finder

Professional-grade apps can reach an accuracy of +/- 1 cent , often exceeding the sensitivity of the human ear. Modes:

Tuner. Get in tune and ready for the show with our fast, accurate, and easy-to-use, online tuner. Metronome. Timing is everything. Guitar Tuner: Chords Metronome - App Store - Apple