# Processing & p5.js iCompiler vs Programmer Calculator

The clearest difference is rating: Programmer Calculator at 4.6 against Processing & p5.js iCompiler's 3.6. Programmer Calculator also leads on update cadence (fortnightly vs every 2 months). Processing & p5.js iCompiler's advantage is review sentiment (58% vs 42%). On price, ratings volume, ads and in-app purchases 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 Programmer Calculator sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Programmer Calculator holds the better App Store score, 4.6 against 3.6. Both are backed by a comparable volume of ratings — 84 and 33 respectively. Written reviews complicate that: 58% of Processing & p5.js iCompiler's written reviews are positive against 42% of Programmer Calculator's, so the app with the better star average is not the one people write more warmly about.

Processing & p5.js iCompiler ships an update every 2 months, Programmer Calculator fortnightly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Processing & p5.js iCompiler | Programmer Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (84 ratings)](https://appshunter.io/ios/app/processing-and-p5js-icompiler/id648955851/reviews) | **[4.6 (33 ratings)](https://appshunter.io/ios/app/programmer-calculator-dev/id1624892520/reviews)** |
| Number of ratings | **84** | 33 |
| Positive reviews | **58.0% of reviews** | 42.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 10 MB | 5 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [riedel.wtf apps S.L.](https://appshunter.io/developer/517545753) | [永超 侯](https://appshunter.io/developer/906391544) |

## 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


### Programmer Calculator

[App page](https://appshunter.io/ios/app/programmer-calculator-dev/id1624892520)

This tool assists developers with number base conversions and CRC calculations for strings and hex bytes. Additional features are planned for future updates.

**Highlights:** Number base conversion, CRC calculation, String to hex conversion, Hex byte CRC calculation, Developer support tool

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A coke | $0.99 | one-time |
| A cup of coffee | $2.99 | one-time |
| A big meal | $5.99 | 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 Programmer Calculator free?

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

### Which has better reviews, Processing & p5.js iCompiler or Programmer Calculator?

Programmer Calculator is rated higher. Processing & p5.js iCompiler averages 3.6 out of 5 from 84 ratings, while Programmer Calculator averages 4.6 from 33 ratings.

### Do Processing & p5.js iCompiler or Programmer Calculator have ads?

Neither Processing & p5.js iCompiler nor Programmer Calculator shows ads.

### Which is updated more often, Processing & p5.js iCompiler or Programmer Calculator?

Processing & p5.js iCompiler ships an update every 2 months, and Programmer Calculator fortnightly. Most recently, Processing & p5.js iCompiler was updated on November 1, 2026 and Programmer Calculator on November 3, 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.*