FlexTunerPro

Customizable tuner

Only for iPhone

Free · In-App Purchases · Designed for iPhone

iPhone

FlexTuner Pro is a high-precision tuner app designed for guitarists, bassists, and string instrument players. Key Features ◆ 3 Tuning Modes • Tuner(Auto): Automatically detects and tunes played strings • Tuner(Manual): Select specific strings for precise tuning • Practice: Ear training mode with reference tones ◆ Instrument Profiles • 6-String Guitar (Standard tuning) • 7-String Guitar• 4-String Bass • 5-String Bass • Ukulele (Soprano) • Contrabass and other Strings Instruments • Create custom profiles ◆ Customization • A4 reference pitch adjustment (430-450Hz) • Individual string frequency settings • Supports tuning for situations such as when using a guitar capo through overall pitch adjustment • Profile export/import • Guide tone waveform can be changed from Profile Edit. Available waveforms: Sawtooth, Square, Triangle, and Original (easier to hear in low frequency ranges) ◆ User-Friendly • Large, clear tuning meter • Precise cent display • Auto-lock prevention during tuning • Japanese/English support ※ Important Note Due to the harmonics produced by musical instruments, the octave of the detected pitch may sometimes be incorrectly identified. Please note that there is currently no available method to improve this misdetection issue. 30-Day Free Trial Try all features free for 30 days. Premium Version After the trial period, a one-time purchase is required to continue using the app. Once purchased, enjoy all features forever.

Ratings & Reviews

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Minor corrections to iOS26 support Change the default of the guide sound to the original waveform

Version 1.1.5

The developer, SATOSHI NAGASAKA, 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
      • SATOSHI NAGASAKA
    • Size
      • 2.7 MB
    • Category
      • Music
    • Compatibility
      Requires iOS 18.5 or later.
      • iPhone
        Requires iOS 18.5 or later.
      • Mac
        Requires macOS 15.5 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 2.5 or later.
    • Languages
      • English and Japanese
    • Age Rating
      4+
    • In-App Purchases
      Yes
    • Copyright
      • © 2025 nagarin's Apps
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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