Bourdon: Tuner

Precise, chromatic, with drone

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Five tuners in one: needle, trace, strobe, voice and drone. Sub-cent accuracy on sustained notes, fully offline. Tune your way. Bourdon is a precise, beautifully simple string tuner for a wide range of instruments. It tracks pitch with a professional algorithm (McLeod/MPM) plus phase refinement that reaches sub-cent accuracy on sustained notes, responding instantly even in noisy rooms — all in a clean, minimalist dark design. FIVE MODES IN ONE - Needle: an analog VU meter with a damped needle, for the classic tuning feel. - Trace: string-by-string tuner with a smooth visual trail and a real headstock that turns green as you go. - Strobe: the most precise mode. The stripes freeze when you nail the note, down to fractions of a cent. - Voice: a free chromatic vocal tuner — or set a target note and practice until you nail it. - Drone: a sustained reference tone (warm organ timbre) using your tuning's notes, perfect for singing or tuning by ear. 15 INSTRUMENTS, MANY TUNINGS - Guitar, classical, 7- and 12-string, baritone, 4- and 5-string bass, double bass, ukulele, violin, viola, cello, mandolin, banjo and bouzouki. - Tunings such as Standard E, Drop D, Drop C, half- and whole-step down, DADGAD, Open G/D/E and more. - Each instrument with its own headstock, so you always know which string you're tuning. TWEAKS FOR MUSICIANS - Temperaments: Equal, Pythagorean, Just Major, Kirnberger III and Quarter-comma Meantone. - Adjustable A4 reference (432–446 Hz). - Normal and Ultra precision. - In-tune confirmation with sound and haptics. PRIVATE AND OFFLINE - All processing happens on your device. Nothing is collected or uploaded. Tune your way. String by string.

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

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    Information

    Seller
    Santiago Sobrino Arias
    Size
    38.2 MB
    Category
    Music
    Compatibility
    Requires iOS 16.4 or later.
    • iPhone
      Requires iOS 16.4 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+
    Copyright
    © 2026 Santi Babieva
  • Privacy Policy

    • More by Santiago Sobrino Arias

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