Comparison

Drambo 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

Drambo

This app offers a flexible sound design experience, allowing users to build beats, create synthesizers, and process audio with effects. Its innovative modular system simplifies connections and organization, making it suitable for both beginners and experienced musicians. It functions as a standalone application or a plugin within a DAW.

Highlights
  • Modular sound design
  • Intuitive cable-less connections
  • Advanced sequencer
  • Standalone and AUv3 plugin
  • Over 140 modules
  • Polyphonic stereo processing
Features
Read full description

"Drambo changes the face of iOS music apps." Cult of Mac Drambo is your all-in-one sound laboratory that adapts to your workflow: build beats as a groovebox, design synths, or transform audio with effects, standalone or inside your favorite DAW. At the core of Drambo is a fresh approach to modular design that makes creating with modules easy, fun, and accessible. Connections happen automatically as you add or move modules, so there are no messy cables to slow you down. The interface adapts to your workflow, generating modulation controls when you need them, and even lets modules contain other modules for perfect organization. You’re always free to override the automatic connections, but most of the time, you can just dive in, experiment, and shape sounds without getting tangled in wires. Use a deep and innovative sequencer to compose patterns and whole tracks, for production or live performance. Go beyond simple looping sequences with parameter locking, conditional step components, parameters automation and powerful scene morphing. Drambo works equally well as a self-contained standalone app or audio unit plugin with audio and MIDI connectivity as an AUV3 instrument, audio effect and MIDI effect. You can use Drambo as • A Complete Studio: Produce entire tracks and perform live in a self-contained, multitrack environment. • An Endless modular playground, that allows you to build, modify and store custom instruments and effects. For instance: build a custom synth, sample and resample, build a Theremin using a gyroscope module, or turn your table into a playable surface, by processing microphone input with physical modelling modules. • An Advanced MIDI Sequencer: Control hardware or AUv3 instruments. Generate custom MIDI CC messages or send modulation signals to physical modular synths via DC-coupled interfaces. • The Ultimate AUv3 Plugin: Load Drambo inside other DAWs as an instrument, audio effect, or MIDI processor. Replace dozens of standard plugins by building your own complex modular delays, reverbs, decimators, or modulators in seconds. • A Unified Audio-Visual Studio (Drambo Visual IAP): Arts united. Step into another realm of modular visual synthesis to build complex generative video art, or seamlessly patch your audio and visual engines together for deeply integrated performances. Features: • Polyphonic, stereo processing and audio-rate modulation. All signals are equal. Up to 16 voices per modular instrument rack. • Unique modular concept: cable-less, drag'n'drop, color coding dynamic interface, automatic connections, and customizable compact, rack views. • Directional flow makes Drambo routing and patching straightforward. Signal flows only left to right, so there are no instant feedback routings in Drambo. Delayed feedback is possible using certain modules. • Simple and clean interface, that scales to every size and device orientation • Over 140 modules available, such as: oscillators, samplers, physical modelling modules, LFOs, envelope generators, filters, audio effects, mixers, MIDI processors, sequencers and math functions. (Includes a macro oscillator based on the famous Eurorack Plaits module, with 24 synth engines) • Custom modular racks that can be nested, with presets at the track, rack, and module level. • Clip launcher / song arrager. • 16-tracks, polyphonic sequencer with parameter locks, automation and step components. 8 dedicated step sequence editor types, piano-roll, powerful automation designer with drawing modes and cubic Bezier curves. • Audio Units hosting ( standalone app only ) • Morph groups: you can morph many parameters using a single slider. • Available as a standalone app, AUv3 instrument, effect and MIDI effect. • MIDI and Ableton Link support Drambo is all about control. Control things that other apps don’t even give you access to. Visit the BeepStreet page for help and tutorials, and Patchstorage for community content.

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

Drambo4 screens
Audulus 44 screens

Verdict

The call

The clearest difference is price: Audulus 4 at Free against Drambo's $24.99. Drambo's advantage is rating (4.8 vs 4.3) and review sentiment (87% vs 69%). On update cadence, 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

Audulus 4 is free to download; Drambo costs $24.99 up front. Drambo sells 5 one-off in-app purchases 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

Drambo holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 325 and 74 respectively. Written reviews point the same way: 87% of Drambo's written reviews are positive against 69% of Audulus 4's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 24, 2026 and September 12, 2026 respectively.

Scorecard5 real differences · 5 level
Drambo versus Audulus 4: the parameters behind the verdict, then further details
ParameterDramboAudulus 4
Price$24.99Free — better
Rating4.8 (325 ratings) — better4.3 (74 ratings)
Positive reviews86.7% of reviews — better69.2% of reviews
Number of ratings325 — better74
Update frequencyMonthlyMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.6 — better18.0
Further details — not scored
Size144 MB103 MB
Age rating4+4+
DeveloperBeepStreetAudulus LLC

Customer experience

Drambo

All ratings325 ratings
Positive94.8%
Neutral2.2%
Negative3.1%
Written reviews225 reviews
Positive86.7%
Neutral3.1%
Negative10.2%

Audulus 4

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

User reviews

Drambo

From 325 App Store ratings

What we love

  • 🚀 Incredibly powerful and flexible
  • 🎨 Endless creative possibilities
  • 👍 Intuitive and well-designed interface
  • 🔧 Modular synth capabilities
  • 🎛️ Excellent sequencing and groove box features

Room to improve

  • 🐛 Occasional crashes and stability issues
  • 🔒 Limited undo/redo functionality
  • 🔊 Audio export issues (pitch/tempo problems)
  • 🔀 Lack of dedicated audio track support

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

Drambo

Reported bugs

3 issues
  • Audio cutting out after 5 minutes of use
  • Presets and patches not loading properly
  • Incompatibility with certain iOS devices

Requested features

5 requests
  • Stem/track export functionality
  • MIDI CC learn and external control
  • Ableton Link support
  • More parameter control and modulation options
  • Improved piano roll and sequencing tools

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

5 purchases

Drambo

One-time5
  • Granular extension$4.99
  • Waves extension$4.99
  • Formants extension$4.99
Show 2 more
  • DSP extensions 1$4.99
  • Visual extension$14.99
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 Drambo free?
Drambo costs $24.99, and also offers in-app purchases.
Is Audulus 4 free?
Audulus 4 is free to download, with in-app purchases available.
Which has better reviews, Drambo or Audulus 4?
Drambo is rated higher. Drambo averages 4.8 out of 5 from 325 ratings, while Audulus 4 averages 4.3 from 74 ratings.
Do Drambo or Audulus 4 have ads?
Neither Drambo nor Audulus 4 shows ads.
Which is updated more often, Drambo or Audulus 4?
Drambo ships an update monthly, and Audulus 4 monthly. Most recently, Drambo was updated on September 24, 2026 and Audulus 4 on September 12, 2026.

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