# Processing & p5.js iCompiler vs Flutter UI Templates

The clearest difference is rating: Flutter UI Templates at 4.4 against Processing & p5.js iCompiler's 3.5. Flutter UI Templates also leads on review sentiment (100% vs 58%) and in-app purchases (none vs 5). Processing & p5.js iCompiler's advantage is ratings volume (80 vs 7) and iOS requirement (11.0 vs 15.0). On price, update cadence, ads and device support 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. Flutter UI Templates asks for nothing beyond the download.

Flutter UI Templates holds the better App Store score, 4.4 against 3.5. That said, the two scores are not equally well evidenced: Processing & p5.js iCompiler has 80 ratings behind it against 7, 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 100% of Flutter UI Templates's.

Processing & p5.js iCompiler ships an update every 5 weeks, Flutter UI Templates every 2 months. The most recent releases landed on September 30, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Processing & p5.js iCompiler | Flutter UI Templates |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (80 ratings)](https://appshunter.io/ios/app/processing-and-p5js-icompiler/id648955851/reviews) | **[4.4 (7 ratings)](https://appshunter.io/ios/app/flutter-ui-templates/id1524943343/reviews)** |
| Number of ratings | **80** | 7 |
| Positive reviews | 58.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Freemium | **Free** |
| Size | 33 MB | 30 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [riedel.wtf apps S.L.](https://appshunter.io/developer/517545753) | [Joachim Tobias Nohl](https://appshunter.io/developer/1450637209) |

## 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


### Flutter UI Templates

[App page](https://appshunter.io/ios/app/flutter-ui-templates/id1524943343)

Explore a collection of user interface designs created with Flutter. This application serves as a visual showcase of what's possible with Flutter's design capabilities, allowing users to test and view different UI elements.

**Highlights:** Flutter UI design showcase, Interface testing, Visual demonstration, Sound null safety, UI element exploration

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

**In-app purchases:** none


## Frequently asked questions

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

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

### Is Flutter UI Templates free?

Flutter UI Templates is free to download, with no in-app purchases.

### Which has better reviews, Processing & p5.js iCompiler or Flutter UI Templates?

Flutter UI Templates is rated higher. Processing & p5.js iCompiler averages 3.5 out of 5 from 80 ratings, while Flutter UI Templates averages 4.4 from 7 ratings.

### Do Processing & p5.js iCompiler or Flutter UI Templates have ads?

Neither Processing & p5.js iCompiler nor Flutter UI Templates shows ads.

### Which is updated more often, Processing & p5.js iCompiler or Flutter UI Templates?

Processing & p5.js iCompiler ships an update every 5 weeks, and Flutter UI Templates every 2 months. Most recently, Processing & p5.js iCompiler was updated on September 30, 2026 and Flutter UI Templates on September 27, 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.*