Troublemaker vs Audulus 4
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Troublemaker
This app emulates the iconic TB-303 bassline synthesizer, offering its distinctive sound with a diode filter, sawtooth, and square wave oscillators. It provides extensive MIDI and sequencer features, allowing for creative sound design and integration with DAWs.
- Diode filter emulation
- Sawtooth and square wave oscillators
- Realtime Mutation Probability Engine
- Standalone sequencer (1-64 steps)
- Audio Unit (AUv3) compatibility
- MIDI CC controllers
- MIDI Clock Sync
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Featured in the US Appstore! Here's what the reviews say: "Perfect for on the move acid sessions, the Trouble Maker app faithfully recreates the sound of the original TB-303" - DJ Mag "Troublemaker is absolutely no trouble at all to heartily recommend" - SoundOnSound "If you want to make the bassline from Josh Wink’s ‘Higher State of Consciousness’ on the bus, this is the app for the job" - Factmag.com "Top-notch stuff from a developer that just keeps getting better" - Musicappblog.com "This app has been consuming all of my time this week! Love it!" - Discchord.com Introducing Troublemaker: this is not a 303 The legendary TB-303 has magical properties; it is filled to the brim with analog shimmer. Its output jack is a gateway to a parallel universe and when you twiddle the filter knobs an army of highly trained pixies chisel the square waves from freshly harvested unicorn souls. So if you want a TB-303, you should buy a TB-303. But if you're after *that sound* Troublemaker will give you everything you need in spades. Troublemaker sports a carefully crafted diode filter emulation and among the available oscillators are the typical raspy, nasal sawtooth and rubbery square wave with its oddball shape and shifting pulse width. It also has the wow. Troublemaker is fully Audio Unit (AUv3) compatible, so you can go wild running multiple instances in your favorite DAWs. It also has: - MIDI CC controllers for all knobs (predefined), - Core Midi, Virtual Midi, Bluetooth Midi input, - MIDI Clock Sync, MIDI Start / Stop support - Realtime Mutation Probability Engine - Standalone sequencer supports 1-64 steps - Audiobus 3 support (audio + MIDI) - Exports MID and WAV files from the standalone sequencer - User manual and MIDI charts on ruismaker.com - Comes with an extra AUv3 plugin version of a modded Troublemaker unit And unlike the TB-303, it can actually sound like a bass guitar ;-)
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.
- 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
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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
Verdict
The clearest difference is price: Audulus 4 at Free against Troublemaker's $8.99. Troublemaker's advantage is in-app purchases (none vs 27) and rating (4.6 vs 4.3). On ratings volume, ads and device support 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
Audulus 4 is free to download; Troublemaker costs $8.99 up front. Audulus 4 sells 27 in-app purchases, starting at $4.99 per month. Troublemaker asks for nothing beyond the download.
Troublemaker holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 64 and 74 respectively. Written reviews point the same way: 78% of Troublemaker's written reviews are positive against 69% of Audulus 4's.
Troublemaker ships an update every 2 weeks, Audulus 4 monthly. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.
| Parameter | Troublemaker | Audulus 4 |
|---|---|---|
| Price | $8.99 | Free — better |
| Rating | 4.6 (64 ratings) — better | 4.3 (74 ratings) |
| Positive reviews | 77.9% of reviews — better | 69.2% of reviews |
| Number of ratings | 64 | 74 — better |
| Update frequency | Every 2 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #176 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 103 MB |
| Age rating | 4+ | 4+ |
| Developer | Bram Bos | Audulus LLC |
Customer experience
Troublemaker
Audulus 4
Bugs and requests
Troublemaker
Not enough reviews yet to summarise bugs or requests.
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
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- 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
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- Sync to host as AUv3
- Make upgrade path clearer from Audulus 3
In-app purchases
Troublemaker
No in-app purchases
Audulus 4
- Audulus Pro (1 Month)7 Days trial$4.991 Month
- Audulus Pro (1 Year)7 Days trial$29.991 Year
- 1-shot Sample$1.99
- P-Train$2.99
- CLK RS-1$3.99
Show 22 moreShow fewer
- 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 Troublemaker free?
Is Audulus 4 free?
Which has better reviews, Troublemaker or Audulus 4?
Do Troublemaker or Audulus 4 have ads?
Which is updated more often, Troublemaker or Audulus 4?
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