# entanglement entropy vs Boolean Builder by ChatStick

The clearest difference is in-app purchases: entanglement entropy at none against Boolean Builder by ChatStick's 1. entanglement entropy also leads on ads (none vs shown) and iOS requirement (18.0 vs 26.2). On price and device support there is nothing between them.

Both are free to download. Boolean Builder by ChatStick sells 1 one-off in-app purchase. entanglement entropy asks for nothing beyond the download.

## The numbers

| Metric | entanglement entropy | Boolean Builder by ChatStick |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Size | 5 MB | 11 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### entanglement entropy

[App page](https://appshunter.io/ios/app/entanglement-entropy/id6737193148)

**Features:** macOS Compatibility

**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 entanglement entropy free?

entanglement entropy is free to download, 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 entanglement entropy or Boolean Builder by ChatStick have ads?

Boolean Builder by ChatStick shows ads; entanglement entropy 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.*