# Chemistry Keyboard vs Gamebook Engine

The clearest difference is price: Chemistry Keyboard at $1.99 against Gamebook Engine's $4.99. Chemistry Keyboard also leads on chart position (#151 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Chemistry Keyboard costs $1.99 and Gamebook Engine $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Chemistry Keyboard | Gamebook Engine |
| --- | --- | --- |
| Price | **$1.99** | $4.99 |
| Rating | **[4.6 (17 ratings)](https://appshunter.io/ios/app/chemistry-keyboard/id914964478/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Monetization | Paid | — |
| Best chart rank | **#151** | — |
| Size | 9 MB | 3 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Generally Helpful Software](https://appshunter.io/developer/286015711) | [Brad Root](https://appshunter.io/developer/1158641227) |

## What reviewers say

### Chemistry Keyboard

[App page](https://appshunter.io/ios/app/chemistry-keyboard/id914964478)

**Currently charting:** #151 Top Paid · Utilities (US App Store)

Easily input chemical formulas with specialized superscript, subscript, and arrow characters. Access lowercase Greek letters and other chemistry-related Unicode symbols. This keyboard extension works offline and includes a demo for viewing Wikipedia data.

**Highlights:** Superscript characters, Subscript characters, Arrow glyphs, Lowercase Greek characters, Chemistry Unicode characters, Offline functionality, Wikipedia data lookup demo

**Features:** Vision Pro support

**In-app purchases:** none


### Gamebook Engine

[App page](https://appshunter.io/ios/app/gamebook-engine/id1478537871)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Chemistry Keyboard free?

Chemistry Keyboard costs $1.99, with no in-app purchases.

### Is Gamebook Engine free?

Gamebook Engine costs $4.99, with no in-app purchases.

### Do Chemistry Keyboard or Gamebook Engine have ads?

Neither Chemistry Keyboard nor Gamebook Engine shows ads.

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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.*