# Karel1981 vs Jedona

The clearest difference is rating: Karel1981 at 4.5 against Jedona's 3.4. Karel1981 also leads on in-app purchases (none vs 1) and ads (none vs shown). Jedona's advantage is ratings volume (60 vs 2) and update cadence (every 2 months vs every 5 months). On price and device support there is nothing between them.

Both are free to download. Jedona sells 1 one-off in-app purchase. Karel1981 asks for nothing beyond the download.

Karel1981 holds the better App Store score, 4.5 against 3.4. That said, the two scores are not equally well evidenced: Jedona has 60 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 67% of Karel1981's written reviews are positive against 47% of Jedona's.

Karel1981 ships an update every 5 months, Jedona every 2 months. The most recent releases landed on October 2, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Karel1981 | Jedona |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/karel1981/id694629633/reviews)** | [3.4 (60 ratings)](https://appshunter.io/ios/app/jedona-compiler-for-java/id1160423626/reviews) |
| Number of ratings | 2 | **60** |
| Positive reviews | **66.7% of reviews** | 46.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 65 MB | 21 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IHPCI.org, z.s.](https://appshunter.io/developer/1253405466) | [Ketan Appa](https://appshunter.io/developer/576435759) |

## What reviewers say

### Karel1981

[App page](https://appshunter.io/ios/app/karel1981/id694629633)

Learn programming with a beginner-friendly language inspired by a robot. This educational tool introduces fundamental coding concepts through interactive exercises, making it ideal for those new to computer science.

**Highlights:** Beginner-friendly programming language, Introduces fundamental coding concepts, Interactive learning exercises, Based on Karel The Robot book, Ideal for computer science novices

**Features:** macOS Compatibility

**In-app purchases:** none


### Jedona

[App page](https://appshunter.io/ios/app/jedona-compiler-for-java/id1160423626)

Write, compile, and run Java code directly on your mobile device. Features include a custom keyboard, syntax highlighting, and iCloud integration. Ideal for learning and testing code snippets on the go.

**Highlights:** Compile and run Java programs, View program output and errors, Custom keyboard for special characters, Syntax highlighting and line numbers, iCloud Drive integration for file import/export

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $2.99 | one-time |

**What reviewers like**

- 👍 Good for basic code snippets
- 👍 Functional and free
- 👍 Useful for practicing Java
- 👍 Works well for simple programs
- 👍 Handy for on-the-go coding

**What reviewers complain about**

- 😠 Too many ads
- 😠 Frequent pop-up ads
- 😠 Not suitable for complex programming
- 😠 Limited functionality
- 😠 Requires internet connection

**Reported bugs**

- Scanner not working correctly
- Cannot use Scanner object more than once
- Input issues with keyboard
- Errors when compiling
- Code gets deleted

**Requested features**

- Add split option for output and input
- Add Maven support for dependencies
- Add real-time input
- Add option to pull from GitHub
- Add browser version


## Frequently asked questions

### Is Karel1981 free?

Karel1981 is free to download, with no in-app purchases.

### Is Jedona free?

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

### Which has better reviews, Karel1981 or Jedona?

Karel1981 is rated higher. Karel1981 averages 4.5 out of 5 from 2 ratings, while Jedona averages 3.4 from 60 ratings.

### Do Karel1981 or Jedona have ads?

Jedona shows ads; Karel1981 does not.

### Which is updated more often, Karel1981 or Jedona?

Karel1981 ships an update every 5 months, and Jedona every 2 months. Most recently, Karel1981 was updated on October 2, 2026 and Jedona 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.*