CBG Tuner - Cigar Box Guitar

CBG Tuner is a precision tuner built specifically for cigar box guitars — the 3 and 4-string instruments played by blues, folk, and DIY musicians everywhere. It now also has a chord finder, drum beats and a loop recorder, so you can tune up and jam in the same app.

THE TUNER IS FREE, ALWAYS. Chord Finder and Looper & Beats are free for 30 days. After that, a one-time purchase (US$1.99, or the equivalent in your currency) unlocks them for good. No subscription, no ads.

TUNER — FREE FOREVER
• Analog needle gauge with a digital Hz and cents readout, so you can tune by eye at a glance or confirm the exact frequency
• Background-noise filtering — ignores TV, fan and room noise so the needle stays steady, even when you're tuning in a busy room
• Every common 3-string tuning: Open G, Open D, Open A, Open E, Open C, modal/jazz voicings, Seasick Steve's "Trance Wonder" (G-G-B), and standard fretted tuning
• Every common 4-string tuning: Open G, Open D (both voicings), Open C, Open A, G-D-G-B, "Chicago Tenor," "Arkansas Tenor," and more
• Custom tuning builder — enter any string as a note name (like G2) or an exact frequency in Hz, and save it for next time
• Tap any string to lock the tuner onto it, instead of relying purely on auto-detect — useful when a string is badly out of tune
• Adjustable A4 reference pitch (calibration) for players who tune slightly off standard concert pitch
• Suggested string gauges for each tuning, as a starting point when restringing
• Six looks to choose from, from a vintage meter to a gold knob
• Note names your way: C D E or Do Re Mi
• Save your favorite tunings for one-tap access
• Works offline once installed — no signal needed in the garage, on stage, or around the campfire

CHORD FINDER — 30-DAY TRIAL, THEN ONE-TIME UNLOCK
• Fretboard diagrams for any root and chord type, in your own 3 or 4-string tuning (it has its own tuning picker, separate from the tuner)
• Slide and one-finger chords first, plus power chords (G5, D5 and more), major, minor, dominant 7th and sus4

LOOPER & BEATS — 30-DAY TRIAL, THEN ONE-TIME UNLOCK
• Metronome and drum beats made for cigar box guitar: stomp box and bottle caps, rock, blues shuffle, slow blues, train beat and heavy metal
• Loop recorder: play along with the beat and record up to 4 layers, in loops of up to 12 bars for 12-bar blues
• Bass mode: play a simple bass line on your cigar box guitar and the app plays it back an octave lower with real bass guitar sounds (best for simple lines, not fast riffs)
• Cleans up your recording: removes the drums and background noise like a TV, so only your playing is looped
• See every track, set its volume, and delete or redo any one of them
• Save your loop to your device, open it again later, or export it as an audio file
• Plays through your phone's Bluetooth speaker or headphones

A Help screen has full instructions and a feedback box, so you can tell us what to improve.

Whether you're tuning a cigar box guitar, a diddley bow, or any other homemade 3 or 4-string instrument, CBG Tuner gives you a real analog-style tuning experience without digging through six-string presets that don't apply to you.

Available in English, French, German and Italian.