Jazz ScaleHelper vs Harmonaut
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jazz ScaleHelper
Improve your musical instrument playing with interactive exercises and real-time feedback. Practice scales, modes, and arpeggios with scoring and performance analysis. Ideal for exam preparation and general skill enhancement.
- Interactive scale and arpeggio practice
- Real-time performance scoring
- Multiple practice modes (play any, choose, challenge)
- Supports Trinity Guildhall and ABRSM syllabuses
- Wide range of scales, modes, and arpeggios
- Supports multiple instruments
- Multi-user support with saved history
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Choose an exercise: see the notes and hear them played Play the exercise: get a score, see the notes you played and listen to your performance Jazz ScaleHelper is the fast way to improve your playing. With actual feedback based on what you played, Jazz ScaleHelper enables you to concentrate on the aspects of your playing that will help the most. Jazz ScaleHelper has 3 modes: 1. Play any scale: Jazz ScaleHelper determines the exercise you have played and scores your performance. Ideal for impromptu practise sessions. 2. Choose a scale: Choose the exercise you want to play and Jazz ScaleHelper listens and gives you a score. Ideal to improve a specific musical exercise. 3. Challenge me: Jazz ScaleHelper will ask you to play exercises from your challenge list that is based on your chosen syllabus. Jazz ScaleHelper will identify what you need to practise and make sure you get exam ready while having fun on the way. Ideal for practising a range of exercises. Jazz ScaleHelper contains everything you need for the instruments covered by the Jazz syllabuses from Trinity Guildhall and ABRSM examining boards. Jazz ScaleHelper will be there for you every step of the way as you grow as a musician. Jazz ScaleHelper allows you to create your own syllabus from the exercises it supports: major scales; dorian modes; lydian modes; lydian flat 7 modes; mixolydian modes; melodic minor scales; jazz melodic minor scales; harmonic minor scales; pentatonic major scales; pentatonic minor scales; blues scales; diminished scales; chromatic scales; whole-tone scales; phrygian modes; locrian modes; altered modes; aeolian modes; major arpeggios; minor arpeggios; augmented arpeggios; major sevenths; minor sevenths; diminished sevenths; half-diminished sevenths; major/minor sevenths; and minor/major sevenths. All exercises are available starting from every tonic over 1 octave, 1 twelfth, 2 octaves, 2.5 octaves and 3 octaves. There is a range of exercise lists for popular music exams available for download. (Jazz ScaleHelper Lite only supports major scales, blues scales and major arpeggios over 1 octave) Instruments supported include Violin, Viola, Cello, Guitar, Bass Guitar, Clarinet, Flute, Oboe, Saxophone, Bassoon, Recorder, Trumpet, Cornet, Trombone and Horn. A full list is available at www.jazz.ScaleHelper.com along with details of the rich feature set Jazz ScaleHelper has to offer. At less than the price of a single music lesson the guidance that Jazz ScaleHelper provides between your lessons builds on that teaching. You can dispense with the need to review scales by playing them in your lessons and instead reuse the time you gain to learn technique and perfect your pieces. Jazz ScaleHelper supports multiple users, keeping each user's history for each of their instruments. You can save recordings to study later or to show and play to your teacher and friends. You can also email recordings to share them with others. Have fun competing with your friends to see who can get the highest score or who can maintain the highest average.
Harmonaut
Create music by feel without needing music theory. This app generates rich chords and smooth progressions, allowing you to shape the mood with intuitive controls. Save and reorder your musical ideas effortlessly.
- Play by feel, no theory required
- Shape mood with tension and brightness faders
- Smooth voice leading for flowing progressions
- Chords named for musicians
- Save and reorder progressions
- Works on iPhone and iPad
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Harmonaut™ is a chord instrument you play by feel. Press a key and hear a rich chord, voice-led smoothly from the last one, no theory needed. Build a progression, shape its mood, and export it as MIDI for your track. Two faders let you shape the mood as you play: more tension or less, brighter or darker, even major to minor. Chase a moody electronic progression, a warm lo-fi loop, a jazzy turn, a cinematic swell, or a simple pop hook. It all comes from your intent, not from naming chords. HOW IT PLAYS • Tension that actually resolves: chords that lean, pull home, and land, so your progression goes somewhere instead of just floating • Every one of the twelve keys is in play: reach past the obvious chords for richer, more surprising color, and it still sounds right • Build a whole progression, not just four chords: every chord you play lands in your trail, ready to reorder or duplicate to try new versions in seconds • Pick up right where you left off: your ideas are saved for you TAKE IT TO YOUR TRACK • Export any progression as a MIDI file and drop it into BandLab, GarageBand, or any DAW that opens MIDI, then play it through any instrument you like • Export to iReal Pro format to keep a chord chart or practice over the changes • Harmonaut Pro unlocks MIDI export, iReal Pro export, and unlimited saved progressions IT SOUNDS GOOD FOR A REASON Every chord is voice-led from the one before it, live, as you play: the notes move the shortest way, so a progression flows instead of jumping around. That's the finished feeling you hear in the songs you love. Push Intensity and the voicings open up: lush 9ths, bright 13ths, and altered dominants like G7#9b13, the colors session keyboard players reach for. And Harmonaut names every chord the way musicians actually write it, like Ebmaj7, so you can hand your progression to a session player, a bandmate, or a producer and they'll play it back exactly, first time. No box to buy, nothing to charge, no menus to dig through. It's already in your pocket. Whether it's your first progression or a sound you can hear but can't name, Harmonaut meets you where you are. See the end user license agreement at the following link: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Harmonaut at 100% against Jazz ScaleHelper's 50%. Harmonaut also leads on price (Free vs $5.99) and in-app purchases (none vs 11). Jazz ScaleHelper's advantage is iOS requirement (15.0 vs 17.0). On ads 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
Harmonaut is free to download; Jazz ScaleHelper costs $5.99 up front. Jazz ScaleHelper sells 11 one-off in-app purchases. Harmonaut asks for nothing beyond the download.
Jazz ScaleHelper ships an update every 6 weeks, Harmonaut every 10 days. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.
| Parameter | Jazz ScaleHelper | Harmonaut |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | — | 5.0 (6 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 6 — better |
| Update frequency | Every 6 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 9 MB | 117 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Williams | District One Mobile, LLC |
Customer experience
Jazz ScaleHelper
Harmonaut
In-app purchases
Jazz ScaleHelper
- Saxophone TRINITY G4$0.99
- Saxophone TRINITY G7$0.99
- Saxophone ABRSM G1 to G3$0.99
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- Saxophone ABRSM G4$0.99
- Saxophone ABRSM G5$0.99
- Trumpet ABRSM G1 to G3$0.99
- Trumpet ABRSM G4$0.99
- Trumpet ABRSM G5$0.99
- Clarinet TRINITY G1 to G8$2.99
- Flute TRINITY G1 to G8$2.99
- Saxophone TRINITY G1 to G8$2.99
Harmonaut
No in-app purchases
Questions
Is Jazz ScaleHelper free?
Is Harmonaut free?
Do Jazz ScaleHelper or Harmonaut have ads?
Which is updated more often, Jazz ScaleHelper or Harmonaut?
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