# Caustic vs LE05

The clearest difference is price: LE05 at Free against Caustic's $9.99. LE05 also leads on rating (4.1 vs 3.5) and update cadence (every 6 weeks vs every 4 months). Caustic's advantage is in-app purchases (none vs 4) and ads (none vs shown). On review sentiment, ratings volume and device support there is nothing between them.

LE05 is free to download; Caustic costs $9.99 up front. LE05 sells 4 in-app purchases, starting at $2.99 per 7 days. Caustic asks for nothing beyond the download.

LE05 holds the better App Store score, 4.1 against 3.5. Both are backed by a comparable volume of ratings — 176 and 139 respectively. Written reviews complicate that: 58% of Caustic's written reviews are positive against 54% of LE05's, so the app with the better star average is not the one people write more warmly about.

Caustic ships an update every 4 months, LE05 every 6 weeks. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Caustic | LE05 |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.5 (176 ratings)](https://appshunter.io/ios/app/caustic/id775735447/reviews) | **[4.1 (139 ratings)](https://appshunter.io/ios/app/le05-digitalism-2000-plus-auv3/id1547016343/reviews)** |
| Number of ratings | **176** | 139 |
| Positive reviews | **57.8% of reviews** | 54.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 52 MB | 209 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rejean Poirier](https://appshunter.io/developer/775735450) | [Audiobus Pty Ltd](https://appshunter.io/developer/672585101) |

## What reviewers say

### Caustic

[App page](https://appshunter.io/ios/app/caustic/id775735447)

Create music with a virtual synthesizer and sampler rig. Build your sound by adding up to 14 machines, including synths and drum machines. Features a mixer, effects, and a song sequencer for real-time audio production.

**Highlights:** Virtual analog subtractive synthesizer, Multi-sample wave synthesizer, Sampling drum machine, Effects rack with 20 effect types, Mixer desk with EQ and effects, Song sequencer, AudioBus and AudioCopy/Paste support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Powerful and feature-rich
- 👍 Intuitive workflow
- 🎨 Excellent sound quality
- 💸 Great value for money

**What reviewers complain about**

- 🐛 Compatibility issues with newer iOS versions
- 🔇 No Bluetooth audio support
- 📁 Difficulty accessing/exporting files
- 🔧 Needs more updates and bug fixes

**Reported bugs**

- Crashes and freezes on newer iPhones
- Interface scaling problems on larger screens
- Unresponsive controls in certain scenarios

**Requested features**

- Bluetooth audio support
- Improved file management and export options
- More synth/instrument options
- Expanded effects and mixing capabilities


### LE05

[App page](https://appshunter.io/ios/app/le05-digitalism-2000-plus-auv3/id1547016343)

Explore a vast collection of vintage synth sounds inspired by early 2000s digital music. This app offers over 1,000 samples and 60+ PCM sound sources, with over 100 presets for immediate inspiration. It functions as a standalone instrument or an AUv3 plugin for popular DAWs.

**Highlights:** Vintage digital synth sounds, Over 1,000 individual samples, 60+ multi-sampled PCM sound sources, Over 100 inspiring presets, Standalone and AUv3 modes, AUv3 automation

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly premium | $2.99 | per 7 days |
| Weekly premium | $2.99 | per 7 days |
| Yearly premium | $9.99 | per year |
| Yearly premium | $9.99 | per year |

**What reviewers like**

- 🎶 Amazing sounds and presets
- 👍 Easy to use interface
- 💡 Innovative sound design
- 💰 Great value for price
- ✨ High-quality audio output

**What reviewers complain about**

- 💸 Unacceptable subscription model
- ❌ No longer recognized in GarageBand
- 🐛 Crashes frequently
- 💾 State-saving issues
- 🚫 Audio not saving

**Reported bugs**

- GarageBand crashes when opening songs with the Audio Unit
- Digitalism not recognized in GarageBand
- No sound when playing MIDI tracks in GarageBand
- State-saving doesn't hold Audio Unit patch settings and parameters
- App crashes at the point of entering the song editor

**Requested features**

- Undo/redo button
- Release for computer (Logic Pro)
- Add Audiobus connection
- More 80s, Synthwave, Funky, Italo disco sounds
- Add a record button


## Frequently asked questions

### Is Caustic free?

Caustic costs $9.99, with no in-app purchases.

### Is LE05 free?

LE05 is free to download, with in-app purchases available.

### Which has better reviews, Caustic or LE05?

LE05 is rated higher. Caustic averages 3.5 out of 5 from 176 ratings, while LE05 averages 4.1 from 139 ratings.

### Do Caustic or LE05 have ads?

LE05 shows ads; Caustic does not.

### Which is updated more often, Caustic or LE05?

Caustic ships an update every 4 months, and LE05 every 6 weeks. Most recently, Caustic was updated on October 20, 2026 and LE05 on October 12, 2026.

---

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