CGDA Tuner

Play a string and the whole screen tells you — green means in tune. Cent-level precision, reference tones, and alternate tunings like Drop D & DADGAD. All free.

CGDA Tuner is a fast, friendly tuner built for string players. Play a string and the whole screen responds — green means you're in tune, warm colours mean you're sharp or flat. No cluttered dials, no guesswork.

NINE MODES, ONE TUNER

• Violin, Viola, Cello, Double Bass
• Guitar, Bass Guitar, Ukulele, Mandolin
• Chromatic mode for everything else

CLEAR, GLANCEABLE FEEDBACK

• Full-screen colour that turns green when you're in tune
• Note name, frequency (Hz), and cent offset at a glance
• Fine-grained meter for landing exactly on pitch
• Over-tension warning helps protect your strings

TUNE BY EAR, TOO

• Play a sustained reference tone for any string and match it — just like tuning to a piano

ALTERNATE TUNINGS

• Guitar: Drop D, DADGAD, Drop C, Open G, Open D, Half-Step Down
• Bass Guitar: Drop D, Half-Step Down
• Ukulele: standard high-G and low-G
• Your last tuning is remembered for each instrument
• Proper flat spelling (E flat, A flat …) where it belongs

MADE FOR PRACTICE

• Starts instantly and works completely offline
• No account, no sign-up
• All instruments and tunings are free — an optional Pro purchase simply removes ads

Whether you're unpacking your cello before rehearsal or dropping your guitar into DADGAD, CGDA Tuner gets you in tune and back to playing.