iHarmony vs iImprov
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iHarmony
This app provides musicians with instant access to a comprehensive music theory reference. It includes scales, chords, harmonizations, and notes with audio playback and support for multiple notation systems. It's designed for songwriting, studying, and quick reference.
- 1500+ scales, chords, and harmonizations
- Chord harmonizations for every scale
- Audio playback for every entry
- Four notation systems (English, Italian, German, French)
- Full-text search
- Offline functionality
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The ultimate music theory reference for every musician. iHarmony gives you instant access to scales, chords, harmonizations, and notes — all in one beautifully designed app. Whether you're preparing for a jam session, writing a song, studying jazz theory, or doing your music homework, iHarmony has the answer. • 1500+ scales, chords, and harmonizations • Chord harmonizations for every scale • Audio playback for every entry — train your ear while you study • Four notation systems: English (C, D, E), Italian (Do, Re, Mi), German (C, D, H), French (Ut, Re, Mi) • Full-text search — find any scale or chord in seconds • Works offline — no internet required Stop searching the web for: "What notes make up a G# diminished 7 chord?" "What are the degrees of the Bebop Dominant scale?" "What's the harmonization of D# Melodic Minor?" iHarmony answers these instantly. Over 1500 entries covering common and exotic scales alike — from the Lydian b7 to the Neapolitan, from Whole Tone to Hungarian Minor. Designed for guitarists, pianists, composers, music students, and professionals. Perfect for functional analysis of jazz standards, songwriting, and music education. Full VoiceOver and accessibility support. Dark mode supported. A must-have for every musician.
iImprov
This app helps jazz musicians of all levels master modal improvisation. It offers detailed explanations of theory, scale relationships, and practical exercises with audio and JAM-A-longs in various keys and styles. Tailored for modal tunes, it covers minor modal, 7 sus 4, and Major 7#4 progressions.
- Modal improvisation theory
- Scale and chord relation explanations
- Pentatonic scale usage
- Audio and visual scale examples
- Interactive JAM-A-longs
- Adjustable tempo and instrument balance
- Transposition selection
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iImprov-Modal is the 2nd release from Jazz Apps Mobile LLC. It is part of a series created for jazz musicians of all levels to help them take on specific challenges that any improvising musician will encounter. Each one contains a full explanation of all the concepts and theory involved as well as written and audio examples and exercises. Each app contains JAM-A-longs in all keys with adjustable tempo and control of instrument balance. Each iImprov app also allows you to select the correct transposition for your instrument. iImprov-Modal specifically provides the tools for confidently playing over modal tunes. The main focus of the app is playing over minor modal tunes, however we have also covered playing over 7 sus 4 modal tunes and Major 7#4 tunes. Exercises and JAM-A-longs specific to each of these types of tunes are included. Features- Full explanation of the concepts involved. Detailed theory of note to chord relations and use of modal scales. Detailed theory of how to use pentatonic scales, including how to play “outside.” Audio and visual representation of the related scales. Audio playback of the scales played over the appropriate chords. Exercises that include live audio examples from saxophonist Tony Bray. JAM-A-longs for Minor Modal (Swing and Funk). JAM-A-longs for 7 sus 4. JAM-A-longs for Major 7#4. Each JAM-A-long was recorded individually in order to give variation for each key. Mixer control for the JAM-A-Long instruments. Tempo control for each JAM-A-long. Unlimited JAM-A-long loop length.
Screenshots
Verdict
The clearest difference is rating: iHarmony at 4.8 against iImprov's 3.0. iHarmony also leads on update cadence (every 5 weeks vs every 28 months) and price ($0.99 vs $3.99). iImprov's advantage is iOS requirement (15.6 vs 26.0). On ads, in-app purchases, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
iHarmony costs $0.99 and iImprov $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iHarmony holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: iHarmony has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 77% of iHarmony's written reviews are positive against 68% of iImprov's.
iHarmony ships an update every 5 weeks, iImprov every 28 months. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.
| Parameter | iHarmony | iImprov |
|---|---|---|
| Price | $0.99 — better | $3.99 |
| Rating | 4.8 (12 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 77.3% of reviews — better | 68.2% of reviews |
| Number of ratings | 12 — better | 2 |
| Update frequency | Every 5 weeks — better | Every 28 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 13 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Alberto De Bortoli | Jazz Apps Mobile LLC |
Customer experience
iHarmony
iImprov
Bugs and requests
iHarmony
Reported bugs
19 issues- Audio not working on iPhone
- Database null error
- Speaker distortion at high volume
- Playback sounds stilted/uneven
- Info link works irregularly or doesn't appear
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- Audio engine buffer fills up quickly
- Some sounds do not match notes
- Cb Major scale has wrong pitch
- App stops working in latest version
- Dominant 7 chords listed as Major 7
- Major 7 chords listed as Major 7+
- Major and Dominant 9 chords incorrect
- Text is very small in Harmonies section
- No sound from speakers
- Audio playback not working after upgrade
- App is completely empty
- Some chords have incorrect notation
- Accidental symbols in wrong place
- Audio engine buffer fills up quickly
Requested features
40 requests- Save favorite scales
- Add more exotic scales
- Allow harmonic playback (all notes simultaneously)
- Provide other theory features (harmonic substitutions, polychords, inversions)
- Add a search function for chords/scales
Show 35 moreShow fewer
- Display scales/chords on a staff
- Add a chord scratch pad for saving/exporting
- Include minor major seventh chords
- Add suspended 2 chords and others
- Option to hear unarpeggiated chords
- Allow choosing ascending OR descending scale playback
- Add Roman numeral labelling
- Interactive circle of fifths
- Notated examples
- Include scale formulas
- Add George Russell Lydian Chromatic Concept scales
- Zoom functionality or larger font
- Piano keys indicated
- Allow controlling playback speed
- Repeat/loop function for listening
- Link scales to chords they are used over
- Show modes associated with chords
- Search function by typing scale/chord symbols
- View of chords/scales on a staff
- North American style chord formatting
- Better GUI/organizational method
- Make it a universal app (iPhone/iPad)
- Separate ascending/descending scale playback
- Add dominant and altered dominant chords
- Hear inversions of scales/chord types
- Nashville # system in harmonies
- All chords available in notes section
- Tabs for instruments
- Easy Beats direction for updates
- Fix Cb Major scale pitch
- Show the 8th note/tonic in listening
- End scales on the ONE
- Full screen without frames for viewing windows
- Larger viewing windows
- Better icon design
iImprov
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iHarmony
No in-app purchases
iImprov
No in-app purchases









