FretSee: Guitar Tuner & Notes

See your music, not just hear it.

FretSee turns your iPhone into a complete practice companion for guitar: a precise tuner, a live note detector, and a fretboard that lights up as you play.

TUNER
Tune by ear-level precision without the guesswork. The illuminated dial shows exactly how far each string is off, automatically detects which string you're playing, and confirms with a sound and a gentle tap when you hit the center. Choose from Standard, Drop D, Drop C, Open G, Open D, and All 4ths tunings — or lock a single string while you work on it.

LIVE NOTE DETECTION
Play any note and FretSee names it instantly — pitch, frequency, intonation, and the most likely string and fret. Perfect for checking your ear, exploring the neck, or finding that note you keep hearing in a song.

THE FRETBOARD THAT PLAYS ALONG
Strum a chord or pick a melody and watch the notes glow across a beautifully rendered fretboard — every playable position, with the best one highlighted. Below it, your notes appear in real music notation as you play, so you can literally watch your playing become sheet music.

PRACTICE TOOLS
Chords Library: the essential open and barre chords with clear diagrams and finger numbers
Metronome: sample-accurate clicks with accented downbeats, 30–260 BPM, adjustable time signatures
Reference Tones: sustained pitches for every string, for training your ear
Adjustable reference frequency (432–446 Hz)

MADE FOR REAL PRACTICE
Fine-tune how sensitive note capture is, how long markers linger, and how quiet sounds are filtered out — so scrapes and slides stay out of your notation. All audio is analyzed entirely on your device: no account, no ads, and your sound never leaves your phone.

Whether you're tuning up before a session, learning where the notes live on the neck, or building speed with the metronome — FretSee helps you tune, see, and play.