MelodyHarmonizer vs FrobulatorAU
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!
FrobulatorAU
This audio effect plugin transforms sounds with spectral delay, adding unique character to music projects. It's a free and open-source tool designed for use in various audio applications, offering extensive creative possibilities.
- Spectral delay effect
- AUv3 plugin
- Use in GarageBand, AUM, and other DAWs
- Multiple instances per project
- Free and open-source
- No ads or in-app purchases
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Venerable inter-app audio effect Frobulator reborn — at long last — as an AUv3 plugin. Use it in GarageBand, AUM or your favourite audio application. Add multiple instances in the same project. Drag your frobulation kicking and screaming into the 21st century. Frobulator is a spectral delay effect. It makes your noises a little bit stranger. Twiddle the knobs to find something you like, or don't and throw it away. No-one will hold it against you. Frobulator is free as in beer and free as in speech. Freer, probably, given the state of both those things these days. No ads, no in-app purchases, no subscriptions, no surveillance, no nag screens. If you happen to be one of the 6 people who asked for this, rejoice! If you aren't, now's your chance to discover what you've been missing all this time. Or not. I'm not the boss of you.
Screenshots
Verdict
The clearest difference is price: FrobulatorAU at Free against MelodyHarmonizer's $1.99. MelodyHarmonizer's advantage is update cadence (every 4 days vs every 9 days). On ads, in-app purchases, device support 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
FrobulatorAU is free to download; MelodyHarmonizer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MelodyHarmonizer ships an update every 4 days, FrobulatorAU every 9 days. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.
| Parameter | MelodyHarmonizer | FrobulatorAU |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (8 ratings) — better |
| Number of ratings | — | 8 — better |
| Update frequency | Every 4 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 101 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Atte Tenkanen | Matthew Caldwell |
In-app purchases
MelodyHarmonizer
No in-app purchases
FrobulatorAU
No in-app purchases









