# Processing & p5.js iCompiler vs Multi Compiler

The clearest difference is review sentiment: Processing & p5.js iCompiler at 58% against Multi Compiler's 0%. Processing & p5.js iCompiler also leads on rating (3.5 vs 1.0) and ads (none vs shown). Multi Compiler's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Processing & p5.js iCompiler sells 5 in-app purchases, starting at $3.49 per month and Multi Compiler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Processing & p5.js iCompiler holds the better App Store score, 3.5 against 1.0. That said, the two scores are not equally well evidenced: Processing & p5.js iCompiler has 80 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 58% of Processing & p5.js iCompiler's written reviews are positive against 0% of Multi Compiler's.

Processing & p5.js iCompiler ships an update every 2 months, Multi Compiler every 3 months. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Processing & p5.js iCompiler | Multi Compiler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (80 ratings)](https://appshunter.io/ios/app/processing-and-p5js-icompiler/id648955851/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/multi-compiler/id1536319920/reviews) |
| Number of ratings | **80** | 1 |
| Positive reviews | **58.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 10 MB | 6 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [riedel.wtf apps S.L.](https://appshunter.io/developer/517545753) | [Wai Yin Chan](https://appshunter.io/developer/1376527988) |

## What reviewers say

### Processing & p5.js iCompiler

[App page](https://appshunter.io/ios/app/processing-and-p5js-icompiler/id648955851)

Develop and compile Processing and p5.js code directly on your mobile device. Export your creations as standalone apps for offline use. Ideal for students and educators learning creative coding.

**Highlights:** Compose and compile code on mobile, Export projects as home screen apps, Offline app usage, Code highlighting and formatting, 3D sketches and games support, Error highlighting (Pro feature)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Processing Pro (Monthly) | $3.49 | per month |
| Processing Pro (Annual) | $9.99 | per year |
| Processing for iOS Tip | $4.99 | one-time |
| Processing Pro Lifetime Unlock | $25.99 | one-time |
| Processing for iOS Tip | $99.99 | one-time |

**What reviewers like**

- ✅ Works offline without internet connection
- 👍 Free app with no mandatory payment
- 🎨 Good for quick creative coding and sketches
- 📱 Portable Processing development on mobile
- ⚡ Relatively fast performance for mobile IDE

**What reviewers complain about**

- 🚫 Compiler errors hidden behind paywall
- 🐛 Data loss and code deletion issues
- ❌ No error messages or debugging output
- 📝 Poor syntax highlighting (highlights wrong keywords)
- ⌨️ No auto-indentation or code formatting

**Reported bugs**

- Code reverts to earlier versions after app sleep
- Changes lost when phone falls asleep
- Functions with parameters cause black screen
- StringList data type not recognized
- Boolean highlighting shows 'bool' instead of full word

**Requested features**

- Free basic error messages for all users
- Undo/redo functionality
- Project renaming capability
- Project duplication feature
- Robust auto-save and backup system


### Multi Compiler

[App page](https://appshunter.io/ios/app/multi-compiler/id1536319920)

This application allows users to write and execute code in various programming languages. It supports multiple languages, making it a versatile tool for developers and students learning to code. The app provides a platform to test and run code snippets directly on your device.

**Highlights:** Supports multiple coding languages, Code execution on device, Versatile for learning and testing, User-friendly interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock languages | $0.99 | one-time |


## Frequently asked questions

### Is Processing & p5.js iCompiler free?

Processing & p5.js iCompiler is free to download, with in-app purchases available.

### Is Multi Compiler free?

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

### Which has better reviews, Processing & p5.js iCompiler or Multi Compiler?

Processing & p5.js iCompiler is rated higher. Processing & p5.js iCompiler averages 3.5 out of 5 from 80 ratings, while Multi Compiler averages 1.0 from 1 ratings.

### Do Processing & p5.js iCompiler or Multi Compiler have ads?

Multi Compiler shows ads; Processing & p5.js iCompiler does not.

### Which is updated more often, Processing & p5.js iCompiler or Multi Compiler?

Processing & p5.js iCompiler ships an update every 2 months, and Multi Compiler every 3 months. Most recently, Processing & p5.js iCompiler was updated on October 16, 2026 and Multi Compiler on October 8, 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.*