Comparison

Geo Synthesizer vs YouCompose

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

Head to head
About

Geo Synthesizer

This app is an expressive musical instrument and MIDI controller designed for multitouch surfaces. It offers advanced pitch control, custom sounds, and the ability to control external instruments or virtual MIDI apps. It also supports AudioBus for interconnecting audio apps.

Highlights
  • Expressive multitouch interface
  • Advanced pitch bending
  • MIDI output
  • AudioBus support
  • Customizable performance menus
  • Multiple temperament options
  • Load SampleWiz presets
Features
Read full description

Geo Synthesizer is a musical instrument and MIDI controller. Originally a collaboration of Wizdom Music's Jordan Rudess and Kevin Chartier (MorphWiz, SampleWiz) and Rob Fielding (Mugician), Geo Synthesizer is an incredibly expressive musical instrument specifically created for a multitouch surface. Jordan is now working with Roli-Labs, creators of the amazing Seaboard instrument on an exciting future for Geo Synthesizer and it's users! A comprehensive Geo Synthesizer manual is available at: http://www.wizdommusic.com/GeoSynth/manual.html Jordan says: "Since touching a preliminary piano keyboard on an iPhone screen and realizing the amazing potential for musical expression on a multitouch device, I have been inspired to create next-generation musical instruments for iOS. Geo Synthesizer is a dream come true in many ways. It is the fastest truly playable iOS instrument that I have put my hands on to date. I can fly through the range of an instrument while expanding on the kind of advanced pitch control we introduced in MorphWiz. As someone who grew up with synthesizers, I can tell you that pitch bending has never been this good! "Geo features many of my custom sounds and in addition, Geo is also a MIDI controller, so you can use it with any external midi instrument or virtual MIDI. Virtual MIDI allows you to control an app running in the background on the same device! Geo Synthesizer also now features AudioBus, a technology that allows one to interconnect audio apps in exciting new ways! A great feature of Geo is that internally and externally we send independent voices on each note played, so as an example, you can pitch bend one note and not the other, or add unique expression on every note! I can't wait to see the YouTube videos of all of you guys rocking out with Geo Synthesizer!!!" Features: - AudioBus - ability to load waveforms from SampleWiz presets - octave rounding for effortless soloing over large ranges - whammy slider with absolute and relative modes - 12ET, 24ET, 53ET, and 665ET temperament options - mono, string, and full-polyphony modes - tuning and transposition controls - snap speed control to affect how quickly the instrument pulls notes in tune - playing surface options for number of rows and columns on screen - octave and fifth harmonics synthesis options to rich, organ-like sounds - gain control to add distortion to the sound - FM and touch FM controls for timbal variation - mono out for use with guitar amps - sine, sawtooth, square, and custom (SampleWiz) wave options - attack and release controls - synthesis body control - lowpass filter with resonance - stereo delay - reverb - MIDI output with polyphonic note bending and multiple configuration options to allow compatibility with a wide range of hardware and software synthesizers - performance menu lets you make your own custom menu so all the controls you need are always right at your fingertips - 40 presets carefully selected by Jordan Rudess, including patches from Jordan's personal sound library

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.

Screenshots

Geo Synthesizer4 screens
YouCompose4 screens

Verdict

The call

The clearest difference is rating: YouCompose at 4.4 against Geo Synthesizer's 3.3. YouCompose also leads on update cadence (every 4 months vs every 11 months). Geo Synthesizer's advantage is price ($9.99 vs $12.99) and iOS requirement (9.0 vs 14.0). On review sentiment, ratings volume, 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

Geo Synthesizer costs $9.99 and YouCompose $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

YouCompose holds the better App Store score, 4.4 against 3.3. Both are backed by a comparable volume of ratings — 19 and 35 respectively. Written reviews point the same way: 68% of Geo Synthesizer's written reviews are positive against 70% of YouCompose's.

UpkeepUpdate frequency

Geo Synthesizer ships an update every 11 months, YouCompose every 4 months. The most recent releases landed on October 26, 2026 and October 22, 2026 respectively.

Scorecard5 real differences · 5 level
Geo Synthesizer versus YouCompose: the parameters behind the verdict, then further details
ParameterGeo SynthesizerYouCompose
Price$9.99 — better$12.99
Rating3.3 (19 ratings)4.4 (35 ratings) — better
Positive reviews68.4% of reviews70.0% of reviews — better
Number of ratings1935 — better
Update frequencyEvery 11 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS9.0 — better14.0
Further details — not scored
Size27 MB399 MB
Age rating4+4+
DeveloperWizdom Music LLCElstar

Customer experience

Geo Synthesizer

All ratings19 ratings
Positive42.1%
Neutral21.1%
Negative36.8%
Written reviews117 reviews
Positive68.4%
Neutral8.5%
Negative23.1%

YouCompose

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

Bugs and requests

Geo Synthesizer

Reported bugs

18 issues
  • Glitchy sound on iPad Pro
  • App not working correctly
  • No longer works on iPadOS
  • Clicking sound on iPhone 6
  • Core MIDI not working like before (iOS 9)
Show 13 more
  • Crashing on launch (iOS 8.3)
  • Audiobus initialization problem
  • App crashes after last update
  • New presets can't be loaded
  • Envelope filters can't be adjusted
  • No access to menu config page
  • App shuts down on boot up (OS5)
  • Crashes on start-up (iPad 2)
  • Doesn't work on iPhone 4S
  • Sounds sometimes drop out
  • Horribly noisy until volume adjusted
  • No smooth transitions between notes
  • SampleWiz not working with it

Requested features

20 requests
  • Update for iPadOS
  • Fix glitchy sound on iPad Pro
  • Support for Bluetooth MIDI
  • Refund option
  • Fix zooming issue on iPhone 11
Show 15 more
  • Add more columns like GeoShred
  • Output MIDI note velocity based on touch pressure
  • 3D Touch for velocity and aftertouch
  • Assignable magic slider for FM or volume swells
  • Broader sound library
  • More control over MIDI output
  • SF2 import for sounds
  • MIDI input for live use
  • Assign a major 3rd break between rows
  • Record feature within the app
  • Copy and paste functionality
  • More intuitive menus and buttons
  • More sophisticated patch programming
  • Multi-channel pitchbending support
  • More tutorial materials for technique and creativity

YouCompose

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Geo Synthesizer

No in-app purchases

None

YouCompose

No in-app purchases

Questions

Is Geo Synthesizer free?
Geo Synthesizer costs $9.99, with no in-app purchases.
Is YouCompose free?
YouCompose costs $12.99, with no in-app purchases.
Which has better reviews, Geo Synthesizer or YouCompose?
YouCompose is rated higher. Geo Synthesizer averages 3.3 out of 5 from 19 ratings, while YouCompose averages 4.4 from 35 ratings.
Do Geo Synthesizer or YouCompose have ads?
Neither Geo Synthesizer nor YouCompose shows ads.
Which is updated more often, Geo Synthesizer or YouCompose?
Geo Synthesizer ships an update every 11 months, and YouCompose every 4 months. Most recently, Geo Synthesizer was updated on October 26, 2026 and YouCompose on October 22, 2026.

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