Comparison

Factory vs Audulus 4

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

Head to head
About

Factory

Create complex and organic sounds with a powerful modular synthesizer. Explore a vast array of synthesis types, a deep modulation matrix, and dynamic signal flow. Easily find and morph between sounds with a built-in browser and crossfader.

Highlights
  • Modular synthesis with extensive modulation matrix
  • Multiple oscillator engines and synthesis types
  • Dynamic signal flow with 3-FX chain
  • Morph crossfader for sound transformation
  • Preset browser with tagging and rating
  • Sequencers, Arpeggiator, and Quantizer
Read full description

Made for complex and organic sounds, Factory sports a big modulation matrix with all kinds of features to create a wildlife of sounds. A vast array of DSP is ready to play: Analog style oscillators and filters, but also different flavors of wavetable synthesis, Wavetable driven Waveguide resonators and a 3-FX-Chain in a dynamic signal flow. With the Morph crossfader, sounds can be changed drastically, but always musically. The Preset Browser with tags and rating makes finding sounds easy and fun. Don´t miss out on super sonic modular mayhem and check Factory today! Key Features: • Poly Synth with Mod-Matrix and Sequencers • 2x10 Oscillator Engines • Sub-Oscillator with Ringmodulation • Noise Generator with 5 colors • 8-voice VA-Sync, Wavetable, Waveguide & Fractal Synthesis • 8x10 Mod Matrix with 36 targets • Morph Fader, 2 States & Copy/Paste • Envelopes and LFOs • Sample & Hold Modul • 4x Sequencers for all kinds of Gates and CV's, incl. 36 motion curves, uni/bipolar. • Arpeggiator, Intonation engine, Scale Quantizer • 11 Filter models & 3x Multi-Effect with drag 'n' drop signal flow • Audio Unit v3 & Standalone • Virtual, Network, External & Bluetooth MIDI • Ableton Link • MIDI Learn & Host Automation • Preset iCloud Sync • Preset Share

About

Audulus 4

Create and shape sounds with a professional-grade modular synthesizer environment. Explore a vast library of modules for synthesis and sound design, with the option to expand your toolkit with premium instruments and effects. Available across Apple devices for seamless workflow.

Highlights
  • Modular synthesizer environment
  • Sound design tools
  • Real-time audio shaping
  • Extensive module library
  • Premium Pro Modules (in-app purchases)
  • Cross-device iCloud sync
  • AUv3 plugin support
Features
Read full description

Build synthesizers. Design sounds. Shape audio in real time. All with professional-grade, low-latency performance ready for live use — and it’s free. Audulus gives you a complete modular environment at no cost. Its clean, fluid interface stays out of the way so you can focus on what matters: exploring sound. A modular playground with room to grow — from first experiments to advanced designs. Looking for more? Discover the Pro Module series: premium instruments and effects that show what’s possible when world-class sound design meets true modular freedom. Each Pro Module is crafted specifically for Audulus, giving you new ways to expand your sonic toolkit. Available on iPhone, iPad, and Mac — your modular system travels with you. ▶ What People Are Saying: "gem for Apple platforms – gorgeous, fluid" — Peter Kirn, createdigitalmusic.com "stunning!" — Richard Devine, devinesound.net "Remarkable gesture control" — sequencer.de ▶ Join our forum and Discord community! ▶ What You Get: • Complete modular environment — free to download and explore • Pro Module series — premium modules available as in-app purchases • Available on iPhone, iPad, and Mac with iCloud sync • Standalone app or AUv3 plugin • Deep node library for building from scratch • Extensive module library for synthesis and sound design • Multi-channel signal flow for polyphony and complex routing • Next-gen multi-core audio processing • Smooth, high-performance graphics even with massive patches • MIDI I/O with MIDI learn • GLSL shader node for creating advanced visuals • Lua scripting for custom DSP and vector graphics Terms of Use: https://audulus.com/terms.html

Screenshots

Audulus 44 screens

Verdict

The call

The clearest difference is rating: Factory at 4.9 against Audulus 4's 4.3. Factory also leads on review sentiment (81% vs 69%) and ratings volume (487 vs 74). Audulus 4's advantage is update cadence (monthly vs every 4 months) and device support (3 vs 1). On price, ads, in-app purchases and monetization model 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

Both are free to download. Factory sells 1 one-off in-app purchase and Audulus 4 sells 27 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Factory holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Factory has 487 ratings behind it against 74, so its average is the more settled of the two. Written reviews point the same way: 81% of Factory's written reviews are positive against 69% of Audulus 4's.

UpkeepUpdate frequency

Factory ships an update every 4 months, Audulus 4 monthly. The most recent releases landed on August 12, 2026 and September 12, 2026 respectively.

Scorecard5 real differences · 5 level
Factory versus Audulus 4: the parameters behind the verdict, then further details
ParameterFactoryAudulus 4
PriceFreeFree
Rating4.9 (487 ratings) — better4.3 (74 ratings)
Positive reviews81.4% of reviews — better69.2% of reviews
Number of ratings487 — better74
Update frequencyEvery 4 monthsMonthly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPadiPhone, iPad, Mac — better
Requires iOS17.6 — better18.0
Further details — not scored
Size347 MB103 MB
Age rating4+4+
DeveloperSugar Bytes GmbHAudulus LLC

Customer experience

Factory

All ratings487 ratings
Positive97.3%
Neutral1.0%
Negative1.6%
Written reviews97 reviews
Positive81.4%
Neutral5.2%
Negative13.4%

Audulus 4

All ratings74 ratings
Positive82.4%
Neutral4.1%
Negative13.5%
Written reviews78 reviews
Positive69.2%
Neutral10.3%
Negative20.5%

User reviews

Factory

From 487 App Store ratings

What we love

  • 🚀 Powerful synth engine
  • 👍 Intuitive and easy to use interface
  • 🎨 Vast sound design capabilities
  • 💡 Innovative modulation matrix
  • 🎶 Inspiring and unique presets

Room to improve

  • 🐛 Occasional crashes and freezes
  • 🔌 Compatibility issues with other apps
  • 🖥️ Pixelated interface on high-res displays
  • 🔇 Note-sticking problems

Audulus 4

From 74 App Store ratings

What we love

  • ✨ Powerful modular environment
  • 💡 Deep DSP programming capabilities
  • 🎨 Intuitive and beautiful UI
  • 🚀 Seamless workflow across devices
  • 📚 Great for learning synthesis

Room to improve

  • 💸 Expensive in-app purchases/subscriptions
  • ⚠️ Steep learning curve for beginners
  • 📱 UI issues on mobile (scrolling, view obstruction)
  • 📉 High CPU usage
  • ❓ Lack of comprehensive documentation

Bugs and requests

Factory

Reported bugs

2 issues
  • Presets not loading correctly in DAW projects
  • CC assignment issues causing controls to freeze

Requested features

4 requests
  • Ability to modulate morph slider
  • Option to modulate effects parameters individually
  • Arpeggiator with retrigger on key press
  • Better integration with GarageBand and other DAWs

Audulus 4

Reported bugs

13 issues
  • iOS 18 compatibility issues (app not working)
  • Save presets but no 'Load' button
  • Undo command issues with DAWs
  • CMD+Z causing data loss
  • Opt+drag not duplicating modules
Show 8 more
  • Plugin window not resizable
  • Menu filtering not functioning properly on iPhone
  • Select and Import buttons not working
  • Blank screen on open
  • App freezes on iPad Pro
  • Black screen on launch after update
  • No modules appearing after iOS 18 update
  • Patches not appearing after iOS 18 update

Requested features

7 requests
  • Add 'Load' button for presets
  • Improve DAW integration (Undo, duplicate)
  • Resizable plugin window
  • More modules (FFT/IFFT, granular buffering)
  • Add CC in module
Show 2 more
  • Sync to host as AUv3
  • Make upgrade path clearer from Audulus 3

In-app purchases

1 purchases

Factory

One-time1
  • Factory Full Version$24.99
27 purchases

Audulus 4

Subscriptions2
  • Audulus Pro (1 Month)7 Days trial$4.991 Month
  • Audulus Pro (1 Year)7 Days trial$29.991 Year
One-time25
  • 1-shot Sample$1.99
  • P-Train$2.99
  • CLK RS-1$3.99
Show 22 more
  • CG-1 Chord Generator$3.99
  • CLK Clock Generator$4.99
  • MetaEnvelope$4.99
  • Modal Percussion$4.99
  • CLK: TimeWarp$4.99
  • CPR-1$4.99
  • LMT-1$4.99
  • MS-FUNC$5.99
  • CLK SS-516$7.99
  • J-23 Reverb$7.99
  • J-23 Effects$7.99
  • CLK GS-1$7.99
  • Chaos LFO Bundle$7.99
  • ARP-1$7.99
  • CPR-3$7.99
  • SynD-K1$7.99
  • TRIKOR VCO$9.99
  • CLK Tools Bundle$9.99
  • Essential Synth Bundle$9.99
  • VCF Bundle 1$9.99
  • J-23 Space Console$14.99
  • Patch Editing$29.99

Questions

Is Factory free?
Factory is free to download, with in-app purchases available.
Is Audulus 4 free?
Audulus 4 is free to download, with in-app purchases available.
Which has better reviews, Factory or Audulus 4?
Factory is rated higher. Factory averages 4.9 out of 5 from 487 ratings, while Audulus 4 averages 4.3 from 74 ratings.
Do Factory or Audulus 4 have ads?
Neither Factory nor Audulus 4 shows ads.
Which is updated more often, Factory or Audulus 4?
Factory ships an update every 4 months, and Audulus 4 monthly. Most recently, Factory was updated on August 12, 2026 and Audulus 4 on September 12, 2026.

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