MelodyHarmonizer vs Strange Loop
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!
Strange Loop
This app generates unique, non-repeating music using chaos theory and AI. Users can influence the composition by painting on mathematical attractors and mood pads, choosing from various scales, accompaniment styles, and synthesized sounds. It also functions as an AUv3 instrument and MIDI processor.
- AI-generated, non-repeating music
- Interactive painting on attractors and mood pads
- 26 scales and 7 accompaniment styles
- Sampled grand piano and synthesized voices
- AUv3 instrument and MIDI processor
- MIDI file export
- Real-time visual scopes
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Strange Loop writes its own music. Three coupled Lorenz attractors drive the piece — one proposes pitch, one shapes rhythm, one wanders the emotional plane. A Markov policy then decides what actually plays, learning from its own output and rewarding intervals that sound consonant. Chaos proposes, the policy disposes. Slide BLEND to choose who wins. Nothing is pre-recorded and nothing loops. Every run is new. PAINT ON THE MATHS Both scopes are paintable. Draw on the attractor and the trajectory bends toward what you drew and lingers there, pulling the melody into those pitches. Draw on the mood pad and the feeling follows your strokes — brightening the harmony, lifting the register, pushing the tempo. Set how hard the ink leans, how big the brush is, and how long it lasts before it fades. WHAT YOU GET • 26 scales — major and minor modes, pentatonics, blues, whole tone, harmonic and melodic minor, altered, both octatonics, and folk scales from Japan, China, Egypt, Spain, Arabia and Hungary • 7 accompaniment styles — chaos grooves, jazz comping with walking bass, stride piano, Alberti bass, classical, arpeggios, ambient rolls • A sampled grand piano plus synthesised voices: soft piano, glass, strings, FM bell, AM organ, pluck, fat saw and more • 6 moods on a valence/arousal plane, from serene to tense, driving chord quality, register, tempo and note length • Live scopes — the attractors, the note-probability distribution the engine is sampling from, and the mood point, all drawn in real time • Deep control: key, scale, tempo, chaos rho, rhythm spread, grace notes, chord-tone pull, softmax temperature, per-track mixer • Record a take and export it as a standard MIDI file to the Files app — melody, chords and bass on separate tracks TWO AUDIO UNITS Strange Loop ships as an instrument AUv3 and as a MIDI processor AUv3, so it can either play its own sounds or sequence any other instrument in your host. Melody, chords and bass each send on their own MIDI channel, so one instance can drive three different instruments. Both Audio Units follow your host's transport and tempo — hit play in AUM, GarageBand, Logic, Cubasis or Zenbeats and it locks to the grid. One install registers both. CREDITS Sampled piano: Salamander Grand Piano by Alexander Holm (CC BY 3.0).
Screenshots
Verdict
The clearest difference is price: Strange Loop at Free against MelodyHarmonizer's $1.99. Strange Loop also leads on device support (4 vs 2). MelodyHarmonizer's advantage is in-app purchases (none vs 1). On update cadence, ads and iOS requirement 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
Strange Loop is free to download; MelodyHarmonizer costs $1.99 up front. Strange Loop sells 1 one-off in-app purchase. MelodyHarmonizer asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 25, 2026 and November 1, 2026 respectively.
| Parameter | MelodyHarmonizer | Strange Loop |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (9 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 9 — better |
| Update frequency | Every 4 days | Every 4 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 101 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Atte Tenkanen | Soft Brew Mobile |
In-app purchases
MelodyHarmonizer
No in-app purchases
Strange Loop
- Unlock AUV3 Plugin$2.99
Questions
Is MelodyHarmonizer free?
Is Strange Loop free?
Do MelodyHarmonizer or Strange Loop have ads?
Which is updated more often, MelodyHarmonizer or Strange Loop?
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