oTuner - Guitar & Bass Tuner

Strobe Tuner for Your Wrist

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Tune from your wrist, no iPhone needed. Needle and strobe displays for 12 instruments and 33 tunings, from guitar and bass to violin and shamisen. No sign-up needed. oTuner is a simple tuner for iPhone and Apple Watch. Just play a note and see the note name and how far off you are, in big, clear type. It covers 12 instruments and 33 tunings, from guitar, bass and ukulele to violin and shamisen. - TUNE FROM YOUR WRIST oTuner runs standalone on Apple Watch, no iPhone needed. On stage or mid-practice with your hands full, just glance at your wrist. Launch it straight from a watch-face complication. - NEEDLE AND STROBE - Meter: the needle and color show at a glance whether you're sharp or flat - Strobe (Pro): the direction and speed of the moving stripes reveal drift too small for a needle to show When you're in tune, oTuner shows "In tune" and gives a haptic tap. - AUTOMATIC STRING DETECTION In guitar and bass tunings, oTuner detects which string you're playing. Tuned strings get a check mark, so you always know where you left off. Tap a string to lock onto it. - INSTRUMENTS AND TUNINGS - Chromatic (any note) - Guitar: Standard / Half Step Down / Whole Step Down / Drop D / Drop C# / Drop C / Open G / Open D / Open E / Open C / DADGAD - 7-String Guitar: Standard / Drop A - Bass: Standard / Half Step Down / Drop D - 5-String Bass: Standard / High C - Ukulele: Standard / Low G / D Tuning / Baritone - Violin / Viola / Cello / Double Bass (including solo tuning) - Mandolin - Banjo: Open G / Double C - Shamisen: Honchoshi / Niagari / Sansagari - MAKE IT YOURS - Reference pitch (A4) from 415 to 466 Hz (440 Hz, 442 Hz and more) - Note names as C D E or Do Re Mi - Haptic feedback on or off - Light, dark or system theme - PRIVATE BY DESIGN - No account needed - Microphone audio is processed on your device and is never recorded or sent anywhere - The core features are free -------------------- oTuner Pro -------------------- Pro unlocks everything: - No ads, ever - Strobe display - Every instrument and tuning (the free version includes Chromatic, Guitar Standard / Half Step Down / Drop D, and Bass and Ukulele Standard) - Switch instruments and tunings directly on Apple Watch - Cyberpunk theme Choose a monthly, yearly or one-time lifetime purchase. Monthly and yearly plans start with a 1-week free trial. Cancel during the trial and you won't be charged. ABOUT AUTO-RENEWING SUBSCRIPTIONS - Payment is charged to your Apple Account at confirmation of purchase. - Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. - Your account is charged for renewal within 24 hours before the end of the current period. - You can manage subscriptions and turn off auto-renewal in Settings > Apple Account > Subscriptions after purchase. - Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use: https://devshion.github.io/otuner/terms Privacy Policy: https://devshion.github.io/otuner/privacy

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The developer, Shion Washida, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based 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

Seller
Shion Washida
Size
45.5 MB
Category
Music
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPad
    Requires iPadOS 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.
  • Apple Watch
    Requires watchOS 10.0 or later.
Languages
English and 4 more
  • English, Japanese, Korean, Simplified Chinese, Traditional Chinese
Age Rating
4+
In-App Purchases
Yes
  • oTuner Pro (Lifetime) $19.99
  • oTuner Pro (Yearly) $9.99
  • oTuner Pro (Monthly) $1.99
  • Learn More
Copyright
Copyright ©︎ 2026 SHION INDUSTRIES All Rights Reserved
  • Developer Website
  • Privacy Policy

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