Diapason: Guitar Tuner

A precision tuner, pro metronome, drone tones and a practice journal in one calm, refined app. No ads, no account, no data collected. Free to download.

Tune precisely, keep steady time and practice with intent.

Diapason is a precise, quiet instrument for iPhone and iPad: a tuner, a pro metronome, reference tones and a practice journal, drawn like a piece of lab equipment. Ink on paper, hairline rules and a single green light that tells you when you're in tune. Start free, and unlock everything with Diapason Pro.

FREE • Chromatic tuner for any instrument or voice, plus standard guitar tuning with automatic string detection • A ±50-cent scale with an in-tune light and haptic confirmation • Metronome from 20 to 400 BPM on a sliding tempo ruler, with time signatures and tap tempo • Keeps playing in the background, with Lock Screen and Dynamic Island controls, a Control Center control and Siri Shortcuts • Reference tones on a one-octave keyboard across six octaves • Practice journal with a streak, a daily goal, your last seven days and Home Screen widgets • Note names as C D E, Do Re Mi or German H

DIAPASON PRO • Strobe tuner with 0.1-cent resolution • Bass, ukulele, violin, viola, cello, double bass, mandolin, banjo, cavaquinho, bouzouki, balalaika and erhu, with 35+ tunings including Drop D, Drop C, DADGAD, Open G/D/E/C/A, Nashville, 7- and 8-string guitar and 5- and 6-string bass • Your own custom tunings, with up to 12 strings • A4 calibration from 400 to 480 Hz, transposition for Bb, Eb, F, G and D instruments, and six historical temperaments • Subdivisions with triplets and swing, per-beat accents and four click sounds • Setlists for your songs and exercises, plus speed trainer, gap trainer and polyrhythms • Four timbres, a pure (beatless) fifth and ±50-cent fine tuning for reference tones • Full practice history, a 12-week calendar, a tempo-progress chart and four signal colors

MADE FOR IPAD TOO • Larger readouts in portrait, and two columns in landscape and Split View

PRIVATE BY DESIGN No ads. No account. No data collected. Audio is analyzed on your device and is never recorded or uploaded.

Diapason Pro is available as a yearly subscription with a 7-day free trial, a monthly subscription, or a one-time lifetime purchase. Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/