Karel1981 vs PingPongScratch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Karel1981
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.
- Beginner-friendly programming language
- Introduces fundamental coding concepts
- Interactive learning exercises
- Based on Karel The Robot book
- Ideal for computer science novices
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Karel is an educational programming language for beginners, created by Richard E.Pattis in his book Karel The Robot: A Gentle Introduction to the Art of Programming. Pattis used the language in his courses at Stanford University, California. The language is named after Karel Čapek, a Czech writer who introduced the word robot.
PingPongScratch
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.
- Connects to Ping-Pong robot data
- View robot scratches on mobile
- Utilizes Scratch programming environment
- Cross-device compatibility (iOS)
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It is an app that uses scratches from the Ping-Pong robot that was installed and used on a computer on a mobile phone. 로보라이즌 핑퐁로봇 스크래치 iOS Scratch is licensed under the Creative Commons BY-SA 2.0 License. For more license details, please refer to https://creativecommons.org/licenses/by-sa/2.0/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Karel1981 | PingPongScratch |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | 4.0 (9 ratings) |
| Positive reviews | 66.7% of reviews | 71.4% of reviews — better |
| Number of ratings | 2 | 9 — better |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 65 MB | 352 MB |
| Age rating | 4+ | 4+ |
| Developer | IHPCI.org, z.s. | RoboRisen |
Customer experience
Karel1981
PingPongScratch
In-app purchases
Karel1981
No in-app purchases
PingPongScratch
No in-app purchases
Questions
Is Karel1981 free?
Is PingPongScratch free?
Which has better reviews, Karel1981 or PingPongScratch?
Do Karel1981 or PingPongScratch have ads?
Which is updated more often, Karel1981 or PingPongScratch?
Other comparisons
