Comparison

Audulus 4 vs VAPORDRUM

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

Head to head
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

About

VAPORDRUM

Create dynamic beats with a powerful drum machine featuring velocity-sensitive pads, a pattern sequencer, and a versatile mixer with tape effects. Add human feel to your programmed rhythms with adjustable timing and dynamics. Import your own samples and export high-quality audio.

Highlights
  • 16 velocity-sensitive pads
  • Pattern and song sequencer
  • Eight-bus mixer with tape effects
  • Human feel engine
  • Import and record samples
  • Export WAV audio
Features
Read full description

VAPORDRUM is a super drum machine: sixteen velocity-sensitive pads, a pattern and song sequencer, an eight-bus mixer with tape effects, and a feel engine that makes a programmed beat breathe like a real drummer. HUMAN FEEL Every instrument gets its own timing, dynamics and nuance. Push the hats loose, keep the kick locked, let the snare land a little heavier now and then. It's repeatable too, so what you hear is exactly what you export. PLAY IT - 16 pads, each with up to three velocity layers - Strike near the top of a pad for a soft hit, near the bottom for a hard one - Accent, flams and rolls - A chance-to-play setting on every pad, for grooves that never repeat quite the same way - Metronome with a choice of sounds, and tap tempo PROGRAM IT - A bank of 16 patterns, with pitch, envelope and micro-timing on every step - Tracks can run at their own lengths and their own speeds, for polymeter - Swing and quantize - A song map, with several songs in each session SHAPE IT - Pitch, decay, pan, envelope and EQ on every pad - Eight output busses, each with its own pan, reverb, tape delay, warble, tape wear, filters and parametric EQ - LFOs throughout, on filters, delay time, tape speed and bus position - LED meters on every bus MAKE IT YOURS - Import your own samples, or record them with the microphone - Save kits: the sounds, the mixer and the effects, ready to load under any pattern - Save sessions, or export them as one file with the samples inside - Four looks for the faceplate TAKE IT WITH YOU - Render a pattern, a song, the full mix, or one stem per bus to WAV - Send them anywhere from the share sheet. A copy stays in the Files app, along with the tempo and loop points - Keeps playing in the background and with the ringer switch on silent - Picks up exactly where you left off, even after you close the app From the makers of VAPORLOOP.

Screenshots

Audulus 44 screens
VAPORDRUM4 screens

Verdict

The call

The clearest difference is price: Audulus 4 at Free against VAPORDRUM's $2.99. Audulus 4 also leads on ratings volume (73 vs 1). VAPORDRUM's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 10). On 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

CostPrice · In-app purchases · Ads · Monetization

Audulus 4 is free to download; VAPORDRUM costs $2.99 up front. Audulus 4 sells 10 one-off in-app purchases. VAPORDRUM asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

VAPORDRUM holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Audulus 4 has 73 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Audulus 4 ships an update monthly, VAPORDRUM daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard7 real differences · 3 level
Audulus 4 versus VAPORDRUM: the parameters behind the verdict, then further details
ParameterAudulus 4VAPORDRUM
PriceFree — better$2.99
Rating4.3 (73 ratings)5.0 (1 ratings) — better
Positive reviews69.2% of reviews—
Number of ratings73 — better1
Update frequencyMonthlyDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size103 MB37 MB
Age rating4+4+
DeveloperAudulus LLCScott Hsiung

Customer experience

Audulus 4

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

VAPORDRUM

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and 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
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

VAPORDRUM

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Audulus 4

One-time10
  • 1-shot Sample$1.99
  • CG-1 Chord Generator$3.99
  • J-23 Reverb$7.99
Show 7 more
  • 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
None

VAPORDRUM

No in-app purchases

Questions

Is Audulus 4 free?
Audulus 4 is free to download, with in-app purchases available.
Is VAPORDRUM free?
VAPORDRUM costs $2.99, with no in-app purchases.
Which has better reviews, Audulus 4 or VAPORDRUM?
VAPORDRUM is rated higher. Audulus 4 averages 4.3 out of 5 from 73 ratings, while VAPORDRUM averages 5.0 from 1 ratings.
Do Audulus 4 or VAPORDRUM have ads?
Neither Audulus 4 nor VAPORDRUM shows ads.
Which is updated more often, Audulus 4 or VAPORDRUM?
Audulus 4 ships an update monthly, and VAPORDRUM daily. Most recently, Audulus 4 was updated on November 3, 2026 and VAPORDRUM on October 31, 2026.

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