MelodyHarmonizer vs Omni
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MelodyHarmonizer
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Are you interested in tonal harmony? Do you want to test your melody with harmony? MelodyHarmonizer is built for musicians, composers, and improvisers looking for new harmonic ideas. With MelodyHarmonizer, you can generate a wide variety of unique harmonizations for any melodic line you provide. Whether your input melody is tonal, chromatic, free-tonal, or even twelve-tone (dodecaphonic), the app explores what kinds of harmonic progressions can be applied to it. A Tool for Harmonic Exploration: MelodyHarmonizer is intentionally not based on standard probabilities. This means it does not necessarily produce a fully polished or the most commonly heard harmonization. Instead of forced, conventional coherence, it opens up unexpected harmonic paths and challenges your musical routine. Key Features: • Control the strength of suggested modulations. • Exclude unwanted chords from the harmonization rules. • Adjust the playback tempo of the harmonized melody. • Fine-tune relative note durations without affecting the underlying harmony. Discover tonal harmony in new contexts and expand your musical creativity with MelodyHarmonizer!
Omni
Create music with a touch-first instrument for chords, strums, and rhythmic ideas. Shape synth sounds, add effects, and send MIDI to other apps or hardware. Designed for fast, expressive musical performance without complexity.
- Touch-based chord and strum performance
- Dual synth engines with performance controls
- Built-in ARP and drum sequencer
- Performance effects (reverb, delay, etc.)
- Customizable chord layouts
- MIDI Out for external control
- AUv3 Instrument support
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Omni: Pocket Synth is a compact, touch-first instrument for creating chords, strums, arpeggios, pads, keys, and rhythmic musical ideas with an immediate performance workflow. Play harmonic layouts directly from the screen, shape two independent pocket synth engines, add motion and effects, and send MIDI to other apps or hardware. Omni is designed to feel fast, musical, and expressive without turning into a complex workstation. Features: - Touch-based chord and strum performance. - Chord Voice and Strum Voice with independent sound controls. - Wavetable and subtractive / virtual analog voice engines with focused pocket controls. - Hold / latch modes for Chord and Strum performance. - Multiple strum modes including Standard, Extended, Pentatonic, Scale, and Chromatic Touchplates. - Built-in ARP with musical patterns, rate, octaves, gate, and swing. - Simple drum engine with kick and snare sequencing. - Reverb, delay, vibrato, and autopan performance effects. - Layout Editor for custom chord layouts. - MIDI In for playing from external controllers. - MIDI Out for controlling other apps, AUv3 instruments, or hardware synths. - Hold / latch performance can also be used with MIDI Out. - AUv3 Instrument support for hosts such as AUM. - Independent Chord MIDI Out and Strum MIDI Out in AUv3 hosts. - Preset Manager with factory and user presets. Omni works both as a standalone app and as an AUv3 instrument. In AUv3 hosts, you can route Chord and Strum MIDI outputs separately, making it easy to control different instruments from one performance surface. The free version includes the core playing experience. Omni Pro unlocks the full preset workflow, AUv3 support, advanced strum modes, Layout Editor, MIDI Out, and other creative tools.
Screenshots
Verdict
The clearest difference is price: Omni at Free against MelodyHarmonizer's $1.99. MelodyHarmonizer's advantage is in-app purchases (none vs 1) and update cadence (every 4 days vs fortnightly). 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
Omni is free to download; MelodyHarmonizer costs $1.99 up front. Omni sells 1 one-off in-app purchase. MelodyHarmonizer asks for nothing beyond the download.
MelodyHarmonizer ships an update every 4 days, Omni fortnightly. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | MelodyHarmonizer | Omni |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 4.3 (6 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 4 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 101 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Atte Tenkanen | Ruben Terron Rodriguez |
In-app purchases
MelodyHarmonizer
No in-app purchases
Omni
- Omni Pro$8.99








