YouCompose vs Harmonicer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
YouCompose
Create original music effortlessly with an AI assistant. This app generates unique compositions using music theory and genetic algorithms, ensuring no copyright issues. It offers a wide range of built-in instruments and flexible editing tools.
- AI-powered music composition
- Original, copyright-free music generation
- 80+ built-in instrument sounds
- Over 85 predefined ensembles
- Multiple creation methods (keyboard, MIDI, grid, score)
- Classical and jazz harmonization
- Advanced editing capabilities
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Meet Aimée, your AI assistant composer, ready to help you create amazing music effortlessly. Aimée: Originality You Can Trust. In the evolving landscape of artificial intelligence and creativity, concerns about originality and copyright are paramount. Aimée, the AI-powered assistant in YouCompose, stands out by ensuring that the music she helps you create is entirely original and free from copyright issues. Aimée Doesn't Steal! Aimée's AI isn't trained on existing musical data. Instead, she generates her own unique musical content. This innovation is achieved through the clever use of an expert system that combines music theory with advanced genetic algorithms. As a result, Aimée produces truly original compositions that are not based on or derived from existing works. At the heart of Aimée's originality is an expert system grounded in comprehensive musical theoretical data. This system provides Aimée with a deep understanding of music, enabling her to compose with creativity and precision. Whether you're crafting a symphony or a simple melody, Aimée applies her theoretical knowledge to ensure your music is harmonically rich and structurally sound. Aimée also leverages genetic algorithms, which allow her to evolve and refine musical ideas through a process akin to natural selection. By iteratively improving upon initial ideas, Aimée can explore a vast space of musical possibilities, generating compositions that are both innovative and musically coherent. This approach is crucial in addressing potential copyright infringements. By not relying on pre-existing musical data, Aimée ensures that the music you create with her assistance is genuinely yours. Why Originality Matters? In the realm of music composition, originality is not just a matter of artistic integrity but also a legal necessity. Copyright infringement can lead to significant legal challenges and financial liabilities. Aimée's ability to create original music provides peace of mind, allowing you to focus on your creative process without worrying about potential legal repercussions. Features of YouCompose and Aimée: Built-in Instruments: - 80 instrument definitions with their sounds, including all regular orchestral instruments, keyboards, organs, guitars, basses, chorus, and percussion. - Over 85 predefined ensembles for quick setup, ranging from trios to orchestras. Creating and Editing: - Create melodies using the built-in virtual keyboard, a MIDI keyboard, a grid or score editor, by importing MIDI files, or by asking Aimée to generate them. - Aimée harmonizes your melodies in classical or jazz style, considering your chosen instruments. - Edit compositions by copying, pasting, moving, and deleting movements, segments, and individual notes. - Let Aimée compose a complete symphony or add new movements based on her own or your melodies. - Control harmonization with instrumentation tools, ‘Composition instructions,’ ‘Harmonization Points,’ or leave it to Aimée. - Combine classical and jazz styles within a single piece. - Special tools for entering lyrics, applying melodic transformations, and creating dynamic effects. Sharing and Saving: - Compatible with Audiobus, AudioCopy, and Inter-App Audio for seamless audio recording and integration with other apps. - CoreMIDI compatible for use with MIDI keyboards, sound modules, or synth apps. - Export audio files in MIDI, AAC, M4A, AIFF, CAF, and WAV formats, with M4A files containing iTunes data like ‘artist,’ ‘song name,’ and ‘lyrics.’ - View, print, save or export full scores and individual parts (transposed when applicable) as PDF. - Save compositions to your device, with options to share via iCloud, email, or AirDrop. - Share compositions through email with YouCompose files, audio files, MIDI files, and PDFs of scores and parts. YouCompose also includes several sample compositions featuring well-known melodies, providing a rich starting point for your musical journey.
Harmonicer
This app generates musical inspiration by combining MIDI quantization, harmonization, and arpeggiation. It offers extensive scale support and allows for the creation of complex chords and rhythmic patterns to enhance musical compositions.
- MIDI Quantizer with 20+ scales
- Custom scale support
- Harmonizer with up to 4 voices
- Arpeggiator with 10 modes
- Process MIDI from any source
- Standalone use with internal keyboard
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Instant Inspiration at Your Fingertips Harmonicer combines MIDI Quantizer, Harmonizer and Arpeggiator into one convenient package. At the core of Harmonicer lies its Quantizer feature with over 20 pre defined scales and support for custom scales. Whether you're a seasoned composer or a novice musician, Harmonicer empowers you to effortlessly create melodies that are harmonically rich and sonically captivating. Unlock Limitless Harmonic Possibilities Harmonicer's Harmonizer functionality takes your compositions to new heights by automatically generating lush chords and harmonies. With up to 4 additional voices and intuitive controls, you can explore a vast array of harmonic possibilities and infuse your music with depth and emotion. Unleash Your Creativity with Dynamic Arpeggiation With Harmonicer's Arpeggiator, intricate rhythmic patterns and melodic sequences are just a few taps away. Whether you're crafting pulsating basslines, mesmerizing synth leads, or intricate melodies, the Arpeggiator empowers you to infuse your tracks with movement and energy, adding a dynamic edge to your music. Combining Power and Versatility What sets Harmonicer apart is its seamless integration of these three powerful tools, allowing users to utilize them individually or in combination to achieve complex compositions with ease. Whether you're looking to fine-tune a melody, enrich your harmonies, or add rhythmic complexity, Harmonicer provides the tools you need to inspire your musical vision and bring it to life. Specs: - Quantizer with support for 20+ pre defined as well as custom scales - Harmonizer with up to 4 additional voices - Arpeggiator with 10 modes, note repeates, ratchets and more - Process MIDI from any source - Standalone use via internal keyboard Supports: - Standalone - AUv3
Screenshots
Verdict
The clearest difference is update cadence: Harmonicer at every 4 days against YouCompose's every 4 months. Harmonicer also leads on price ($7.99 vs $12.99) and rating (4.7 vs 4.4). On ratings volume, ads, in-app purchases 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
YouCompose costs $12.99 and Harmonicer $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Harmonicer holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 35 and 12 respectively. Written reviews point the same way: 70% of YouCompose's written reviews are positive against 80% of Harmonicer's.
YouCompose ships an update every 4 months, Harmonicer every 4 days. The most recent releases landed on September 28, 2026 and September 17, 2026 respectively.
| Parameter | YouCompose | Harmonicer |
|---|---|---|
| Price | $12.99 | $7.99 — better |
| Rating | 4.4 (35 ratings) | 4.7 (12 ratings) — better |
| Positive reviews | 70.0% of reviews | 80.0% of reviews — better |
| Number of ratings | 35 — better | 12 |
| Update frequency | Every 4 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Requires iOS | 14.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 399 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Elstar | Kai Aras |
Customer experience
YouCompose
Harmonicer
In-app purchases
YouCompose
No in-app purchases
Harmonicer
No in-app purchases









