StringLab: Guitar Tuner

StringLab is a fast, accurate tuner for guitar, bass, and ukulele players who care about getting it exactly right.

Play a string and StringLab instantly locks onto the note — it automatically detects which string you're tuning and shows you precisely how far off you are and which way to turn the peg. No menus, no tapping between strings. Just tune.

FEATURES
• Automatic string detection — play any string and StringLab finds it
• Guitar, bass, and ukulele tuning libraries — standard, drop, open, and alternate tunings
• Chromatic mode — tune any instrument to any note, free
• Custom tunings — save your own and recall them instantly
• Instrument rigs — keep multiple setups ready and switch in one tap
• Adjustable reference pitch (A4 calibration)
• Virtual capo — transpose your target tuning up or down by semitones
• Clean, readable gauges in several styles
• Built-in pitch pipe
• Light and dark themes

STRINGLAB PRO — one-time purchase, no subscription ever
• The complete tuning library for every instrument
• Premium gauge styles: Target, Precision, Trail, Dials, and Pulse
• Metronome and a custom theme editor
• Unlimited custom tunings and saved instrument rigs
• Extended transpose range

Tune up. Play in tune. StringLab.