Guitar Harmony Finder
The second guitar part, in key
Only for iPhone
$5.99 · Designed for iPhone. Not verified for macOS.
iPhone
Tap a melody on the fretboard and Harmony Finder writes the second guitar part: in the right key, in one CAGED position, and close enough under your hand to play it.
Play the melody. The app plays the harmony.
Guitar Harmony Finder takes a line you tap on the fretboard and builds a second guitar part to go under or over it — the twin-lead sound, in the key you are actually in.
Any chart can name the notes a third above. Where to put them is the real question, and the answer has to be somewhere your hand can already reach. That is why the second voice stays inside one CAGED position.
HOW IT WORKS
Tap your melody onto the on-screen neck. The key is detected as you go, or you can set it by hand. Pick an interval — thirds and sixths above or below, or fourths, fifths and tenths above — and the second voice appears on its own fretboard underneath, note for note.
WHAT YOU GET
- A second guitar part that follows the scale, not a fixed number of frets
- Held inside one CAGED position, so it stays under your hand
- Both voices on separate necks, every step numbered and named, with the interval spelled out as you select it
- Three guitar tones — nylon, clean electric, distorted electric — at your own tempo
- Hear the melody alone, the harmony alone, or both together
- Drag any harmony note to a fret you prefer and it stays put
- Mute single notes, so a phrase can breathe
- Save up to 20 lines, name them, and open them again
- A built-in guide to reading both necks
- Works entirely offline — no account, no ads, and nothing leaves your phone
WHO IT'S FOR
Guitarists who want the two-guitar sound and have found that working it out by ear takes longer than the idea deserves. If you have ever tried to harmonize your own line and ended up with something that was technically a third and musically wrong, this is the tool for that.
GOOD TO KNOW
The scales are the seven modes of the major scale — major, natural minor, and the five between them. A melody note that steps outside the key keeps the interval it already had — parallel, which is what guitarists actually play — and a note outside the scale is ringed on the neck, so you can see it happened. A harmony with no place on the guitar, like a 6th below an open low E, is left blank and says which end of the neck it fell off.
Questions or feedback? Email support@guitarmodefinder.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Swiping a saved line to delete it now holds on a quick swipe — before, a fast swipe could spring the row back shut.
The developer, Anders Hagen Høigaard, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Anders Hagen Høigaard
- Size
- 42.6 MB
- Category
- Music
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 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.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Anders Hagen Høigaard
