Suggester is a tool to assist in the creation of songs and chord progressions. This app will help you find chords that work together. It is efficient and fun; use it to build musical phrases that will carry emotion through tension and release.

Select chords for their harmonic function. The app makes full use of the roman numeral notation.

Simply click a chord to hear how it sound like. Press the play button to hear the chord progression sequentially and adjust the playback speed.

You can work either forward or backward:
FORWARD - Pick a scale, then build your song from the chords that the app suggests. That's the quickest way to assemble chords that are compatible.
BACKWARD - From the catalog, pick a set of chords that you like. The app will tell you what scales it matches with. After you have selected the scale you want to use, the app can tell you what chords will fit in with the ones you entered before. That is extremely useful in jam sessions!

Pick chords from our huge catalog. Your exotic chord type is not in the catalog? You can still build it by creating a custom chord.

To spice things up, you can borrow chords from parallel scales.

Explore new territories by using modulation.

Browse the classic chord progressions to find inspiration.

Use Drag and Drop to reorder chords.

Every sound generated with the app is also sent to the MIDI output, configurable in the Preferences. You can route these notes to another app, an external MIDI port, or remotely to another computer by setting up a MIDI Network Session. You can also export to a MIDI file or plain text.

You can trigger chords through the MIDI input.

Sync your tempo with other apps with the help of Ableton Link.

Drag a chord directly into any app that supports MIDI drag and drop, such as Logic Pro X.

It includes all the features you like from the iOS version, plus a bunch of improvements: Multiple documents at the same time, full support for undo/redo, copy paste, improved drag and drop, right-click menus... and more!

• Piano
• Electric Piano
• Strings
• Guitar

Chromatic Harmony Devices:
• Secondary dominant chords
• Secondary leading-tone chords
• Neapolitan chord
• Augmented sixth chords (Italian, French, German)
• Borrowed chords
• Modulation

Scale Types :
• Major (Ionian)
• Natural Minor (Aeolian)
• Dorian
• Phrygian
• Lydian
• Mixolydian
• Locrian
• Harmonic Minor
• Harmonic Major
• Jazz Minor
• Hungarian Minor
• Phrygian Dominant
• Major Blues
• Minor Blues
• Prometheus
• Augmented
• Diminished
• Whole Tone
• Neapolitan Major
• Neapolitan Minor
• Persian
• Double Harmonic Major
• Altered Dominant
• Pentatonic Major
• Pentatonic Minor

Chord Types :
• major triad (maj)
• minor triad (m)
• power chord (5)
• dominant 7th (7)
• minor 7th (m7)
• major 7th (M7)
• minor major seventh (mMaj7)
• half-diminished seventh (m7b5)
• dominant seventh flat fifth (7b5)
• dominant seventh sharp ninth (7#9)
• dominant seventh flat ninth (7b9)
• diminished seventh (dim7)
• augmented major seventh (augMaj7)
• dominant 7th suspended 2nd (7sus2)
• dominant 7th suspended 4th (7sus4)
• 9th (9)
• minor 9th (m9)
• major 9th (Maj9)
• minor major 9th (mMaj9)
• 6/9 (6/9)
• minor 6/9 (6/9)
• diminished (dim)
• augmented (aug)
• added 2nd (add2)
• minor added 2nd (madd2)
• added 4th (add4)
• minor added 4th (madd4)
• added 6th (add6)
• minor added 6th (madd6)
• added 9th (add9)
• minor added 9th (madd9)
• suspended 2nd (sus2)
• suspended 4th (sus4)
• dominant eleventh (11)
• sharp dominant eleventh (#11)
• flat dominant eleventh (b11)
• minor eleventh (m11)
• major eleventh (Maj11)
• dominant thirteenth (13)
• minor thirteenth (m13)
• major thirteenth (Maj13)
• Italian augmented sixth (It+6)
• French augmented sixth (Fr+6)
• German augmented sixth (Gr+6)
• and much more!

Additional features:
• Compatible with Ableton Link.
• Full support for undo/redo.
• Optimized for Retina Display.
• Support for drag and drop between apps.
• Supports the Dark Mode.

What’s New

Version 10.0.1

Resolved a stability issue with the creation of custom chords when used with certain scales.

Ratings and Reviews

SonicPlayground ,

Really Useful and Nicely Laid Out

I picked up Suggester about a year and a half ago. It was great then and has only gotten better since. The developers keep updating this on a pretty regular basis which is something I value.

The drag and drop feature is nice for both chords and rests. There are lots of reasons that I’m happy with it, but the #1 thing I like most is running Suggester with Logic projects as I’m working on them. I can audition chord progressions in any of the virtual instrument tracks I’ve setup in Logic right from the Suggester app.I can also drag and drop chords directly from Suggester into Logic projects. Being a guitar player learning piano, these features have been helpful in keeping me composing while I learn.

One thing I’d love to see in a future update is a larger and more comprehensive library of chord progressions that I could drag and drop to alter notes and timing. I understand chord progressions and have some theory under the belt, but sometimes having a number of chord progressions in a specified key would be super helpful for inspiration when writer's block strikes.

Unusual Nickname ,

Uh-oh, no sound output!

1) Loved this app on iOS enough to want to pay for the MacOS version. This app deserves more stars, but for the bad bug noted in (5).

2) This iOS port is missing the Mac-standard option-drag for duplication. Easy chord duplication much needed in the app.

3) App sorely needs a Play-next-chord key command (and a Play-next-chord-within Section key command (to stay looped within section).

4) Small bug: For the very first-listed chord in a key, drag-and-drop fails. All other chords can be dragged into your list. Not that one!

5) BAD BUG: This app is non-functional when used with laptop in clamshell mode. No sound output. :(

Details: App produces no sound output when my MacBook Pro is used in clamshell mode with external cinema display. No choice of system setting for sound output destination makes it make sound (though other apps do): not thru built-in speakers, not thru analog headphone port, not via usb to display audio, not via displayport to cinema display. Obviously, this app is pretty helpless without sound output! When my laptop is open and being used as a standalone workstation, the app sound output delivers as expected. Macbook Pro running High Sierra.

Developer Response ,

Thank you for reporting this issue. The problem has been identified and the fix will be part of the next update.

Norm6777 ,

No melodic minor

Otherwise well worth the money. I’m not a pianist and I’m weak on theory, this allows me to hear the chords I need in the scale I choose, then export via midi into Logic where I can invert, arrange further… I want melodic minor. It’s still 5 stars though. There is something else: I wish there were a mode for a chord suggestions. Ex: If I want to add a chord that isn’t in the scale but I want, I would like to be able to play that chord on the keyboard and have Suggester actually suggest a chord-maybe have some of the existing suggested chords that might work change color


Mathieu Routhier
36 MB

OS X 10.11 or later, 64-bit processor



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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