HarmonyKeen

Harmonize your melodies

$14.99

iPad

Play or draw a melody, tap Generate, and hear it harmonized: from thirds and sixths to full chords, four-part writing and jazz voicings. Launch price for two weeks only. Write a melody. HarmonyKeen writes the harmony. Play or draw a tune, tap Generate, and hear it harmonized: a second voice in thirds or sixths, full chords, four independent parts, barbershop close harmony or open jazz voicings, all built on the rules of harmony that musicians study. ENTER A MELODY • Play it on the on-screen keyboard • Draw notes on the grid with your finger or Apple Pencil • Record it in time with the metronome • Connect a MIDI keyboard • Or import a MIDI file CHOOSE A STYLE From classic thirds and wide sixths to smooth chords, soulful chords, four-part SATB and jazz voicings. Choose how many voices, and whether the harmony sits above or below your melody. Then shape how the parts move: how far they may leap, whether they may move in parallel fifths and octaves, and how closely they follow classical voice-leading. MAKE IT YOURS • Swap any chord for another that fits • Edit notes on the grid or right on the score • Keep every note in key • Move the whole song to any key • Undo and redo your edits HEAR IT, SEE IT, TAKE IT WITH YOU • Instrument sounds for every part • Sheet music you can print • Export MIDI, MusicXML and PDF • Projects saved in Files, including iCloud Drive IN YOUR MUSIC APPS HarmonyKeen also comes as Audio Unit (AUv3) plug-ins, so you can harmonize right inside music apps such as Logic Pro, Cubasis, AUM and GarageBand. One purchase. No subscription, no account, no ads, and no data collected. Made by Malsah Labs in Arizona.

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The developer, Malsah Labs LLC, 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
    Malsah Labs LLC
    Size
    289.2 MB
    Category
    Music
    Compatibility
    Requires iPadOS 18.0 or later.
    • iPad
      Requires iPadOS 18.0 or later.
    Age Rating
    4+
    Copyright
    © 2026 Malsah Labs LLC
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.