Harmonaut vs SuperGrid
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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/
SuperGrid
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SuperGrid is a three channel, generative step sequencer. It has build-in synth voices, but can also be used to control other instruments via midi. • 4×4 grid, three sequenced channels plus a live performance channel • Euclidean trigger patterns and clock modifiers • Per-channel drive, tempo-synced delay, reverb • Weighted randomization with custom scales • MIDI: per-channel out, clock in and out • Background audio, session recall, template saving SuperGrid is free. A one-time purchase unlock additional synth voices and visual themes.
Screenshots
Verdict
Harmonaut and SuperGrid are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Harmonaut ships an update every 10 days, SuperGrid every 9 days. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.
| Parameter | Harmonaut | SuperGrid |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 10 days | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 117 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | District One Mobile, LLC | Jonathan Raymond |
In-app purchases
Harmonaut
No in-app purchases
SuperGrid
No in-app purchases









