Frets: Tuner & Ear Training

A precise chromatic tuner and an ear coach that listens to you sing. Train intervals, chords, and sing-back drills in cents. No login, no ads.

Frets is a precise chromatic tuner and an ear-training coach in one calm, focused app.

THE TUNER Real-time pitch detection with cents precision. Configurable A4 reference (440 Hz, 432 Hz, custom). Works for any instrument — guitar, violin, piano, voice, brass, woodwinds.

EAR TRAINING Most ear-training apps are multiple-choice. Frets listens to you. Sing the note, play the note, and Frets grades you in cents.

• Interval recognition — m2, M2, m3, M3, P4, P5 free; full set with Pro
• Sing-back — Frets plays a note, you sing it, Frets scores your pitch
• Chord quality — major, minor, diminished, augmented, dominant 7th and more
• Spaced repetition that prioritizes your weakest intervals

PROGRESS A 12-week heatmap of your training, a streak counter (with rest days — no guilt), and a clear view of which intervals you keep missing.

NO LOGIN. NO ADS. NO TRACKING. Everything stays on your device.

FREE & FULLY FEATURED Frets is free with a complete tuner and the core training modes. Frets Pro ($3.99, one-time) adds extended intervals, microtonal tuning (19-TET, 31-TET, just intonation), perfect-pitch drills, and a yearly stats view. No subscription. Ever.

Built by an indie developer for musicians who want to actually hear better.