StringLab: Guitar Tuner

Guitar Bass Ukulele Chromatic

Only for iPhone

Free · In-App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Guitar, bass, ukulele & chromatic — auto string detection, alternate tunings, a virtual capo, custom rigs & pro gauges. One-time, no subscription. 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 A4 calibration and transpose range Tune up. Play in tune. StringLab.

Ratings & Reviews

  • This app has not received enough ratings or reviews to display an overview.

Fixed the low string not registering when you tune down into Drop C and other wide drop tunings — no more getting stuck on "Listening." The tuning needle and cents readout are also smoother and more responsive. Plus under-the-hood performance improvements.

Version 1.0.6

The developer, ZapArc, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Provider
    • BTC HODL LTD EOOD
    Size
    • 53.6 MB
    Category
    • Music
    Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 BTC HODL LTD EOOD
  • Privacy Policy

    • More by ZapArc

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