# Karel1981 vs PingPongScratch

The clearest difference is rating: Karel1981 at 4.5 against PingPongScratch's 4.0. Karel1981 also leads on iOS requirement (9.0 vs 13.0). PingPongScratch's advantage is update cadence (monthly vs every 5 months) and ratings volume (9 vs 2). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Karel1981 holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 2 and 9 respectively. Written reviews complicate that: 67% of Karel1981's written reviews are positive against 71% of PingPongScratch's, so the app with the better star average is not the one people write more warmly about.

Karel1981 ships an update every 5 months, PingPongScratch monthly. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Karel1981 | PingPongScratch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/karel1981/id694629633/reviews)** | [4.0 (9 ratings)](https://appshunter.io/ios/app/pingpongscratch/id6741829401/reviews) |
| Number of ratings | 2 | **9** |
| Positive reviews | 66.7% of reviews | **71.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free | Free |
| Size | 65 MB | 352 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IHPCI.org, z.s.](https://appshunter.io/developer/1253405466) | [RoboRisen](https://appshunter.io/developer/1482586469) |

## 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


### PingPongScratch

[App page](https://appshunter.io/ios/app/pingpongscratch/id6741829401)

This application connects to a Ping-Pong robot installed on a computer, allowing users to view and interact with its scratch data on their mobile devices. It leverages the Scratch programming environment for its functionality.

**Highlights:** Connects to Ping-Pong robot data, View robot scratches on mobile, Utilizes Scratch programming environment, Cross-device compatibility (iOS)

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

**In-app purchases:** none


## Frequently asked questions

### Is Karel1981 free?

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

### Is PingPongScratch free?

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

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

Karel1981 is rated higher. Karel1981 averages 4.5 out of 5 from 2 ratings, while PingPongScratch averages 4.0 from 9 ratings.

### Do Karel1981 or PingPongScratch have ads?

Neither Karel1981 nor PingPongScratch shows ads.

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

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