Unison: Piano Tuner

Free pro piano tuner, unisons

Free · Designed for iPad. Not verified for macOS.

Free pro-grade piano tuner. Hear which string is out, tune clean unisons, check any piano in 2 minutes. Real stretch, 8 temperaments. No ads, no account. A free, pro-grade piano tuner. No ads. No account. No paywall. Works offline. Unison does the two things other tuning apps leave to your ear: setting the 2 or 3 strings of each note beat-free, and holding accuracy in the extreme treble and bass. Every feature is free, on all 88 keys. Unisons, solved • See the live beat rate between a note's strings, to a tenth of a hertz • "Which string is out?": a 3-step mute flow names the left, middle or right string, and says if it is sharp or flat • Guidance that calms to beat-free as you pull the string in Real piano stretch • Measure inharmonicity on a few notes; Unison fits your whole keyboard from them • Stretch styles: 4:2, 6:3, 8:4 and 10:5 bass, 4:2, 6:3 or pure 12ths in the middle, 2:1, 4:2 or 4:1 treble • Extra bass and treble stretch, plus custom offsets per key • Choose the partial the tuner listens to on each key Check any piano in 2 minutes • Play the 8 A's or every 3rd key once • Get the average offset, the bad notes, and if a pitch raise is needed • Share the result card as an image Pitch raise that respects the piano • Pre-measure the piano, then the tuner aims each key sharp by its overpull • Bass bridge, wound-string and strut breaks, with safety caps per section • Or keep the piano at its current pitch with a new A4 Everything a pro expects • Needle or strobe display, with one ring per partial • Zoomed spectrum to see each string's peak • Reference tone: hear any key's target as a sine or a piano-like tone, or A4 440 Hz • Stability check: finds a pin that is not set before you move on • Safe-turn guard warns about the wrong pin or the wrong direction • Equal plus 7 historical temperaments, and your own custom temperaments • Adjustable A4 (415 to 466 Hz), calibration check with a fork or a tone • Auto-advance through the keys in 3 orders • One file per piano with tuning history. Import and export TuneLab .tun files • Guided first tuning and a tool guide for beginners Private by design. Audio is analyzed on your device and never recorded, stored or sent. No sign-up. No network needed. Built for full-time tuners, concert technicians and serious hobbyists. If Unison helps you, a rating on the App Store helps other tuners find it.

Ratings & Reviews

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

The developer, Narek Maloyan, 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
    Narek Maloyan
    Size
    2.5 MB
    Category
    Music
    Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 or later.
    • iPad
      Requires iPadOS 16.0 or later.
    • Mac
      Requires macOS 13.0 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 Narek Maloyan
  • Privacy Policy

    • More by Narek Maloyan

    You Might Also Like