# TOPLAPapp vs Audulus 4

The clearest difference is rating: TOPLAPapp at 4.8 against Audulus 4's 4.3. TOPLAPapp also leads on in-app purchases (none vs 27) and review sentiment (95% vs 69%). Audulus 4's advantage is update cadence (monthly vs every 49 months) and ratings volume (74 vs 4). On price, ads and device support there is nothing between them.

Both are free to download. Audulus 4 sells 27 in-app purchases, starting at $4.99 per month. TOPLAPapp asks for nothing beyond the download.

TOPLAPapp holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Audulus 4 has 74 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 95% of TOPLAPapp's written reviews are positive against 69% of Audulus 4's.

TOPLAPapp ships an update every 49 months, Audulus 4 monthly. The most recent releases landed on September 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | TOPLAPapp | Audulus 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/toplapapp/id323675376/reviews)** | [4.3 (74 ratings)](https://appshunter.io/ios/app/audulus-4/id1592022030/reviews) |
| Number of ratings | 4 | **74** |
| Positive reviews | **95.5% of reviews** | 69.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 49 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 0 MB | 103 MB |
| Requires iOS | **7.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Joshua Parmenter](https://appshunter.io/developer/1183665020) | [Audulus LLC](https://appshunter.io/developer/452619536) |

## What reviewers say

### TOPLAPapp

[App page](https://appshunter.io/ios/app/toplapapp/id323675376)

This app offers a unique sonic puzzle experience using a virtual machine for sound synthesis. Users control the machine by placing command letters and adjusting parameter sliders to generate experimental, often noisy, electronic music.

**Highlights:** Virtual machine for sound synthesis, Instruction-based sound generation, Parameter sliders for sound control, Grid-based command placement, Experimental sonic art focus, Live coding principles

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 TOPLAPapp free?

TOPLAPapp is free to download, with no in-app purchases.

### Is Audulus 4 free?

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

### Which has better reviews, TOPLAPapp or Audulus 4?

TOPLAPapp is rated higher. TOPLAPapp averages 4.8 out of 5 from 4 ratings, while Audulus 4 averages 4.3 from 74 ratings.

### Do TOPLAPapp or Audulus 4 have ads?

Neither TOPLAPapp nor Audulus 4 shows ads.

### Which is updated more often, TOPLAPapp or Audulus 4?

TOPLAPapp ships an update every 49 months, and Audulus 4 monthly. Most recently, TOPLAPapp was updated on September 24, 2026 and Audulus 4 on October 6, 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.*