# sir Sampleton vs Audulus 4

The clearest difference is price: Audulus 4 at Free against sir Sampleton's $0.99. Audulus 4 also leads on rating (4.3 vs 3.3) and update cadence (monthly vs every 3 months). sir Sampleton's advantage is in-app purchases (none vs 27) and iOS requirement (10.0 vs 18.0). On review sentiment, ratings volume, ads and device support there is nothing between them.

Audulus 4 is free to download; sir Sampleton costs $0.99 up front. Audulus 4 sells 27 in-app purchases, starting at $4.99 per month. sir Sampleton asks for nothing beyond the download.

Audulus 4 holds the better App Store score, 4.3 against 3.3. Both are backed by a comparable volume of ratings — 47 and 74 respectively. Written reviews point the same way: 66% of sir Sampleton's written reviews are positive against 69% of Audulus 4's.

sir Sampleton ships an update every 3 months, Audulus 4 monthly. Both last shipped on October 2, 2026.

## The numbers

| Metric | sir Sampleton | Audulus 4 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.3 (47 ratings)](https://appshunter.io/ios/app/sir-sampleton/id404873671/reviews) | **[4.3 (74 ratings)](https://appshunter.io/ios/app/audulus-4/id1592022030/reviews)** |
| Number of ratings | 47 | **74** |
| Positive reviews | 66.3% of reviews | **69.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 21 MB | 103 MB |
| Requires iOS | **10.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Paul Slocum](https://appshunter.io/developer/404873676) | [Audulus LLC](https://appshunter.io/developer/452619536) |

## What reviewers say

### sir Sampleton

[App page](https://appshunter.io/ios/app/sir-sampleton/id404873671)

Record and play back sounds on dual keyboards with a built-in rhythm machine. Inspired by 80s samplers, this app lets you create lush, complex musical textures from your voice, instruments, or other noises. Samples can be looped, customized, saved, and shared.

**Highlights:** Sample from microphone, Dual piano keyboards, Built-in rhythm machine, Save and email samples, Download free samples, Adjust tuning and effects, Sample from other apps via Audiobus

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple, intuitive, easy-to-use interface
- 🎹 Great Casio SK-1 emulation and nostalgic appeal
- 🎵 High-quality sound and audio fidelity
- 🎧 MIDI and Audiobus support for integration
- 🎨 Clean, minimalist design

**What reviewers complain about**

- 🐛 Screen orientation issues (stuck in portrait/vertical mode)
- 🐛 Touch input misalignment and unresponsive controls
- 🐛 Graphics scaling problems on newer devices
- 📱 Incompatible with iOS 16 and later versions
- 🐛 Distorted/crackling audio from microphone recording

**Reported bugs**

- Screen stuck in portrait mode, won't rotate to landscape
- Touch input only registers on 1/4 of screen
- Graphics and app engine mismatch causing display corruption
- App incompatible with iOS 16, 16.2, 16.4.1, 17.5.1
- Microphone recording produces unintelligible distorted crackling

**Requested features**

- Export samples as MP3/WAV files
- Sequencer for arranging samples into songs
- Reverse/reverse-loop functionality
- Sustain button/function for live performance
- Arpegiator feature


### Audulus 4

[App page](https://appshunter.io/ios/app/audulus-4/id1592022030)

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:** Vision Pro support

**In-app purchases (27)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Audulus Pro (1 Month) | $4.99 | per month |
| Audulus Pro (1 Year) | $29.99 | per year |
| 1-shot Sample | $1.99 | one-time |
| P-Train | $2.99 | one-time |
| CLK RS-1 | $3.99 | one-time |
| CG-1 Chord Generator | $3.99 | one-time |
| CLK Clock Generator | $4.99 | one-time |
| MetaEnvelope | $4.99 | one-time |
| Modal Percussion | $4.99 | one-time |
| CLK: TimeWarp | $4.99 | one-time |
| CPR-1 | $4.99 | one-time |
| LMT-1 | $4.99 | one-time |
| MS-FUNC | $5.99 | one-time |
| CLK SS-516 | $7.99 | one-time |
| J-23 Reverb | $7.99 | one-time |
| J-23 Effects | $7.99 | one-time |
| CLK GS-1 | $7.99 | one-time |
| Chaos LFO Bundle | $7.99 | one-time |
| ARP-1 | $7.99 | one-time |
| CPR-3 | $7.99 | one-time |
| SynD-K1 | $7.99 | one-time |
| TRIKOR VCO | $9.99 | one-time |
| CLK Tools Bundle | $9.99 | one-time |
| Essential Synth Bundle | $9.99 | one-time |
| VCF Bundle 1 | $9.99 | one-time |
| J-23 Space Console | $14.99 | one-time |
| Patch Editing | $29.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- 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

**Requested features**

- Add 'Load' button for presets
- Improve DAW integration (Undo, duplicate)
- Resizable plugin window
- More modules (FFT/IFFT, granular buffering)
- Add CC in module


## Frequently asked questions

### Is sir Sampleton free?

sir Sampleton costs $0.99, with no in-app purchases.

### Is Audulus 4 free?

Audulus 4 is free to download, with in-app purchases available.

### Which has better reviews, sir Sampleton or Audulus 4?

Audulus 4 is rated higher. sir Sampleton averages 3.3 out of 5 from 47 ratings, while Audulus 4 averages 4.3 from 74 ratings.

### Do sir Sampleton or Audulus 4 have ads?

Neither sir Sampleton nor Audulus 4 shows ads.

### Which is updated more often, sir Sampleton or Audulus 4?

sir Sampleton ships an update every 3 months, and Audulus 4 monthly. Most recently, sir Sampleton was updated on October 2, 2026 and Audulus 4 on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*