Comparison

YouCompose vs VAPolyMkII

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Read full description

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.

About

VAPolyMkII

This virtual analog synthesizer offers a 16-voice bitimbral polyphonic sound engine with two distinct filter models and extensive modulation options. It includes a built-in sequencer, various effects, and supports AudioUnit Extension for integration with DAWs. Projects can be synced across iPhone, iPad, and Mac via iCloud.

Highlights
  • 16-voice bitimbral polyphonic synthesizer
  • Two analog-modeled filter types
  • Extensive modulation capabilities
  • Built-in piano roll sequencer
  • Multiple audio effects
  • AudioUnit Extension (AUv3) support
  • iCloud Drive project syncing
Features
Read full description

VAPolyMkII is a virtual analog bitimbral polyphonic synthesizer for iPhone, iPad and Mac. It features 16 voice synthesizer, effects, sequencer and audio visualization tools. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. The synthesizer consists of two 8 voice synthesizer, which features two oscillators, two ADSR envelopes, resonant high pass and low pass filter and an amplifier per voice. The oscillators features continuously variable wave shape and wide variety of modulation. The filters are modeled on the Sallen-Key filter circuit and cascaded OTA filter circuit for classic analog sound. The Effects include delay, chorus, flanger, reverb, eq and compressor. The sequencer features piano roll and parameter automation editor to program 16 bar pattern per clip. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. - Main Features - Virtual analog 16 voice bitimbral polyphonic synthesizer Two type of Lowpass filter, cascaded OTA model and Sallen-key model. Patch points for modulation. Support MIDI 2.0 New User Interface built by SwiftUI for improved performance. Built-in Sequencer. 16 bar patterns per clip. Total 8 clips. Piano Roll and Parameter automation. Support Audio Unit Extension (AUv3) Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Ableton Link, Bluetooth MIDI, MIDI In / Out. - System Requirements - A13 Fusion or above is recommended. AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension.

Screenshots

YouCompose4 screens
VAPolyMkII4 screens

Verdict

The call

The clearest difference is update cadence: VAPolyMkII at weekly against YouCompose's every 4 months. YouCompose's advantage is price ($12.99 vs $14.99) and ratings volume (35 vs 11). On rating, review sentiment, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

YouCompose costs $12.99 and VAPolyMkII $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for YouCompose against 4.5 for VAPolyMkII. Both are backed by a comparable volume of ratings — 35 and 11 respectively. Written reviews are what separate them: 70% of YouCompose's written reviews are positive against 67% of VAPolyMkII's.

UpkeepUpdate frequency

YouCompose ships an update every 4 months, VAPolyMkII weekly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 5 level
YouCompose versus VAPolyMkII: the parameters behind the verdict, then further details
ParameterYouComposeVAPolyMkII
Price$12.99 — better$14.99
Rating4.4 (35 ratings)4.5 (11 ratings) — better
Positive reviews70.0% of reviews — better66.7% of reviews
Number of ratings35 — better11
Update frequencyEvery 4 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Mac
Requires iOS14.0 — better16.6
Further details — not scored
Size399 MB16 MB
Age rating4+4+
DeveloperElstarRyo Togawa

Customer experience

YouCompose

All ratings35 ratings
Positive80.0%
Neutral11.4%
Negative8.6%
Written reviews50 reviews
Positive70.0%
Neutral12.0%
Negative18.0%

VAPolyMkII

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

YouCompose

No in-app purchases

None

VAPolyMkII

No in-app purchases

Questions

Is YouCompose free?
YouCompose costs $12.99, with no in-app purchases.
Is VAPolyMkII free?
VAPolyMkII costs $14.99, with no in-app purchases.
Which has better reviews, YouCompose or VAPolyMkII?
VAPolyMkII is rated higher. YouCompose averages 4.4 out of 5 from 35 ratings, while VAPolyMkII averages 4.5 from 11 ratings.
Do YouCompose or VAPolyMkII have ads?
Neither YouCompose nor VAPolyMkII shows ads.
Which is updated more often, YouCompose or VAPolyMkII?
YouCompose ships an update every 4 months, and VAPolyMkII weekly. Most recently, YouCompose was updated on October 9, 2026 and VAPolyMkII on October 7, 2026.

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