Comparison

Fugue Machine vs Model 15 Modular Synthesizer

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

Head to head
About

Fugue Machine

This music sequencer uses multiple playheads to create complex melodic patterns inspired by Baroque and serialist composition techniques. Manipulate speed, direction, and pitch to generate unique soundscapes.

Highlights
  • Multi-playhead piano roll
  • Manipulate speed, direction, and pitch
  • Create complex melodic patterns
  • Inspired by Baroque and serialist music
  • Supports MIDI, AUv3 MIDI, Ableton Link
  • Inter-App Audio and Audiobus compatibility
Features
Read full description

A music sequencer reimagined with multiple playheads. "How Bach would have made a sequencer." (Create Digital Music) "A musical feat." (Creator's Project) "A new approach to sequencing." (XLR8R) "A next generation music sequencer." (Ask Audio) Fugue Machine Classic is a tool inspired by composition techniques used in Baroque music and Serialism — e.g. Bach’s canons and fugues, and Schoenberg’s twelve-tone technique. The idea was to design a tool to manipulate a melody’s speed, direction, and pitch, as well as play multiple variations of the melody simultaneously. As it turned out, the best implementation for this was to reimagine one of the most fundamental building blocks of all music sequencers: the piano roll. Fugue Machine Classic is the world’s first multi-playhead piano roll. Create a music sequence and play it back with up to four playheads at once — each at various speeds, directions, pitches, and more. Watch the playheads dance, and hear the complex patterns that emerge. It’s mesmerizing. Fugue Machine Classic supports iPhone, iPad, MIDI, AUv3 MIDI, Ableton Link, Audiobus, Audiobus 3 MIDI, and Inter-App Audio. Thanks to the AUv3 standard, you can run multiple instances of Fugue Machine Classic on a single device when hosted in an AUv3 MIDI host app — like AUM, Logic Pro for iPad, Loopy Pro, and Cubasis.

About

Model 15 Modular Synthesizer

This app recreates a legendary modular synthesizer for mobile devices. Explore its iconic modules, experiment with sound design, and create music with intuitive controls and advanced features.

Highlights
  • Iconic Moog module recreation
  • Monophonic and 4-voice polyphonic operation
  • Integrated Moog keyboard and ribbon controller
  • Sequencing arpeggiator
  • MIDI integration and external control
  • Looping recorder with overdubbing
  • AUv3 Audio Unit Extensions support
Features
Read full description

The Moog Model 15 App is the first Moog modular synthesizer and synthesis educational tool created exclusively for iPad, iPhone and iPod touch. Each facet of the Moog Model 15 modular synthesizer has been meticulously recreated in this application to ensure the power and transcendent sound quality of each module remains intact. The character, harmonic complexity and mystique of the Moog Model 15’s modules, from the legendary Moog 921–series oscillators and 904A Low Pass Filter, to the coveted 907 Fixed Filter Bank have been painstakingly preserved. In order to develop the most immersive and expressive modular interface possible, the Model 15 App has been designed utilizing Apple’s new Metal advanced graphics engine. This ensures that all zooming, panning and modular patching throughout the application feels completely natural, something that would have been impossible otherwise. The Model 15 App features both monophonic and 4-voice polyphonic operation is easily commanded via 4 seamlessly integrated controllers. Simple swipes and taps provide instant access to a traditional Moog keyboard, 1150 ribbon controller, 8-step sequencing arpeggiator and the award-winning Animoog keyboard with 22 built-in scales and polyphonic modulation capabilities. Also included are extended features which expand the capabilities of the app beyond the traditional offerings of the hardware Moog Model 15. These include total MIDI integration, assignment for external control, use as a MIDI controller, dedicated Audio Bridge and MIDI Bridge modules, looping recorder module with overdubbing, a master ping-pong delay module and a new extension cabinet that includes additional amplifiers and voltage-controlled reversible attenuators that can be used for effects like ring-modulation. Because the Model 15 App utilizes Apple’s Metal technology, only 64-bit devices are supported. Compatible devices include iPhone 5s or newer, iPod touch 6 or newer, iPad Air or newer, and the iPad Pro. The Model 15 App requires iOS version 12.4 or later to work. Additional Features • Ships with over 160 unique presets • Recreates the sound of a hardware Moog Model 15 modular synthesizer • Easily share presets and recordings with anyone • Tutorial patches to assist all experience levels • Intuitive patching and cable coloring • Support for landscape and portrait modes • Voltage-controlled stereo ping-pong delay • Expressive sequencing arpeggiator • Moog 1150 Ribbon controller • Real-time looping recorder with overdub and immediate sharing • Up to two controllers on-screen (iPad only) • Optional left-handed UI operation Supports • AUv3 Audio Unit Extensions • 3D Touch and Apple Pencil integration for after pressure • Note-per-channel MIDI controllers • Ableton Link • Inter-App Audio and Audiobus • MIDI Bridge and Audio Bridge • 7 and 14-Bit MIDI • MIDI Program Change • Bluetooth LE MIDI controllers • Typing keyboards for shortcuts and musical typing • AudioCopy, AudioPaste and AudioShare

Screenshots

Fugue Machine4 screens
Model 15 Modular Synthesizer4 screens

Verdict

The call

The clearest difference is price: Fugue Machine at $19.99 against Model 15 Modular Synthesizer's $29.99. Fugue Machine also leads on in-app purchases (none vs 11) and update cadence (every 8 days vs every 3 months). On rating, review sentiment, ratings volume and ads 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

Fugue Machine costs $19.99 and Model 15 Modular Synthesizer $29.99 up front. Model 15 Modular Synthesizer sells 11 one-off in-app purchases. Fugue Machine asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Fugue Machine against 4.9 for Model 15 Modular Synthesizer. Both are backed by a comparable volume of ratings — 624 and 898 respectively. Written reviews are what separate them: 90% of Fugue Machine's written reviews are positive against 86% of Model 15 Modular Synthesizer's.

UpkeepUpdate frequency

Fugue Machine ships an update every 8 days, Model 15 Modular Synthesizer every 3 months. The most recent releases landed on October 29, 2026 and November 1, 2026 respectively.

Scorecard4 real differences · 6 level
Fugue Machine versus Model 15 Modular Synthesizer: the parameters behind the verdict, then further details
ParameterFugue MachineModel 15 Modular Synthesizer
Price$19.99 — better$29.99
Rating4.9 (624 ratings)4.9 (898 ratings) — better
Positive reviews90.3% of reviews — better86.5% of reviews
Number of ratings624898 — better
Update frequencyEvery 8 days — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.0 — better12.4
Further details — not scored
Size8 MB857 MB
Age rating4+4+
DeveloperAlexandernautMoog Music Inc.

Customer experience

Fugue Machine

All ratings623 ratings
Positive96.5%
Neutral1.4%
Negative2.1%
Written reviews238 reviews
Positive90.3%
Neutral5.0%
Negative4.6%

Model 15 Modular Synthesizer

All ratings896 ratings
Positive96.8%
Neutral1.7%
Negative1.6%
Written reviews480 reviews
Positive86.5%
Neutral4.0%
Negative9.6%

Bugs and requests

Fugue Machine

Not enough reviews yet to summarise bugs or requests.

Model 15 Modular Synthesizer

Reported bugs

3 issues
  • Arpeggiator direction not working as expected
  • Distortion and audio issues on latest iOS versions
  • Incompatibility with certain DAWs

Requested features

5 requests
  • More in-depth tutorials
  • Ability to customize module layout
  • Zoom/overview option for entire system
  • Expanded preset library
  • Midi mapping for arpeggiator

In-app purchases

None

Fugue Machine

No in-app purchases

11 purchases

Model 15 Modular Synthesizer

One-time11
  • Symbiotic EquationsFree
  • Synthesist ToolkitFree
  • Angular Arps$1.99
Show 8 more
  • Sonic Mayhem$2.99
  • Sinfonietta Sintesi$2.99
  • Psychotropic Synthesis$2.99
  • Alien Systems$3.99
  • Textural Points$4.99
  • Mid-Century Moog$4.99
  • Dynamic Drones$4.99
  • Mercurial Strategies$5.99

Questions

Is Fugue Machine free?
Fugue Machine costs $19.99, with no in-app purchases.
Is Model 15 Modular Synthesizer free?
Model 15 Modular Synthesizer costs $29.99, and also offers in-app purchases.
Which has better reviews, Fugue Machine or Model 15 Modular Synthesizer?
Model 15 Modular Synthesizer is rated higher. Fugue Machine averages 4.9 out of 5 from 624 ratings, while Model 15 Modular Synthesizer averages 4.9 from 898 ratings.
Do Fugue Machine or Model 15 Modular Synthesizer have ads?
Neither Fugue Machine nor Model 15 Modular Synthesizer shows ads.
Which is updated more often, Fugue Machine or Model 15 Modular Synthesizer?
Fugue Machine ships an update every 8 days, and Model 15 Modular Synthesizer every 3 months. Most recently, Fugue Machine was updated on October 29, 2026 and Model 15 Modular Synthesizer on November 1, 2026.

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