# Karel the Robot vs Boolean Builder by ChatStick

The clearest difference is price: Boolean Builder by ChatStick at Free against Karel the Robot's $1.99. Karel the Robot's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Boolean Builder by ChatStick is free to download; Karel the Robot costs $1.99 up front. Boolean Builder by ChatStick sells 1 one-off in-app purchase. Karel the Robot asks for nothing beyond the download.

## The numbers

| Metric | Karel the Robot | Boolean Builder by ChatStick |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/karel-the-robot/id807177431/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 20 months | — |
| Monetization | Paid | — |
| Size | 3 MB | 11 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [CloudMakers, s. r. o.](https://appshunter.io/developer/789740577) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### Karel the Robot

[App page](https://appshunter.io/ios/app/karel-the-robot/id807177431)

This educational app introduces programming concepts through interactive logic puzzles. It features a friendly robot that follows simple instructions, making coding accessible and fun for beginners and children.

**Highlights:** Learn programming concepts, Interactive logic puzzles, Robot-based instruction, Structured programming environment, Beginner-friendly coding

**In-app purchases:** none


### Boolean Builder by ChatStick

[App page](https://appshunter.io/ios/app/boolean-builder-by-chatstick/id6764350982)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Boolean Builder Premium | $1.99 | one-time |


## Frequently asked questions

### Is Karel the Robot free?

Karel the Robot costs $1.99, with no in-app purchases.

### Is Boolean Builder by ChatStick free?

Boolean Builder by ChatStick is free to download, with in-app purchases available.

### Do Karel the Robot or Boolean Builder by ChatStick have ads?

Boolean Builder by ChatStick shows ads; Karel the Robot does not.

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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.*