ToneLens

Guitar Chords in Real Time

Only for iPhone

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

iPhone

ToneLens listens to music playing around you and instantly detects chords, key, and scale, displaying everything in real time on an interactive guitar fretboard. Whether you're jamming along to your favorite songs, learning new progressions, or improvising solos, ToneLens is your real-time companion. REAL-TIME CHORD DETECTION Play any music nearby, a speaker, a friend's guitar, a song on your phone. ToneLens uses your microphone to analyze the audio as it plays. No internet needed. Everything happens on your device, instantly. KNOW WHERE TO PLAY Notes light up on the fretboard exactly where your fingers should go. Five display modes adapt to your level: - Chord: The shape under your fingers, on the fretboard - Pentatonic: The 5 notes that always work - Triad: The three notes of the chord - CAGED: Box positions with ghost strings - Scale: Full scale with chord tones emphasized PREDICT THE NEXT CHORD See what's coming before it happens. ToneLens analyzes the progression and shows the predicted next chord so you're never late. FREQUENCY FILTERS Playing along to a full band? Filter what you hear: - Bass strings (5-6): Follow the rhythm - Mid strings (3-4): Follow the chords - Treble strings (1-2): Follow the melody NO SUBSCRIPTION Try every feature free for 7 days. Then one single purchase unlocks everything forever. No monthly fee. No yearly renewal. PRIVACY Your music stays yours. 100% on-device processing. No audio is ever recorded or sent anywhere. No account needed. No tracking, no ads.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Sharper chord detection, significantly fewer misreads on busy songs. New Chord mode shows the shape under your fingers right on the fretboard. Cleaner layout with quicker access to modes and positions. Smaller iPhone screens get extra breathing room.

Version 1.1.0

The developer, Visto Engineering Sa, 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, 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
    • Visto Engineering Sa
    Size
    • 10.9 MB
    Category
    • Entertainment
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 32 more
    • English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Visto Engineering SA
  • Privacy Policy

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