# Rapid Brain — Challenge yourself

> Challenge yourself (iPhone/iPad app by John William.)

- Source: https://appshunter.io/ios/app/rapid-brain/id1534474776 (this page in markdown: same URL + `.md`)
- Developer: [John William](https://appshunter.io/developer/1112008883)
- Category: Games, Lifestyle, Action, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 12 MB
- Languages: English
- Released: 2020-10-19
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/rapid-brain/id1534474776/reviews.md

## What is Rapid Brain?

Are you ready for challenge? 

Challenge yourself & find out how fast your are in words, numbers & memories

+ Guess the word : Can you find out the word from its definition?

+ Fun with numbers : How good are you in math? Challenge yourself with different math operations, ascending & descending

+ Play with emojis : What is your favourite emoji? Can you find the same emojis or remember them in correct arrangement?

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock all numbers | $4.99 | one-time |
| Unlock all words | $4.99 | one-time |
| Unlock all | $6.99 | one-time |
| Unlock all memories | $4.99 | one-time |
| Get 100 coins more | $2.99 | one-time |
| Get 200 coins more | $3.99 | one-time |
| Get 400 coins more | $6.99 | one-time |
| Remove ads | $2.99 | one-time |
| Get 1000 coins more | $13.99 | one-time |



## Version history (last 1 release)

### 1.0.1 — 2020-10-22

+ Minor fixes and performance

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## More apps by John William

- [Tamged Coptic](https://appshunter.io/ios/app/tamged-coptic/id1163466274)
- [Meal Menu](https://appshunter.io/ios/app/meal-menu/id1506762108)
- [My Quick Budget](https://appshunter.io/ios/app/my-quick-budget/id1508613410)
- [My Agpeya Coptic](https://appshunter.io/ios/app/my-agpeya-coptic/id1517398386)
- [Naqlun Coptic Dictionary](https://appshunter.io/ios/app/naqlun-coptic-dictionary/id1525120781)
- [Construction Connect](https://appshunter.io/ios/app/construction-connect/id1532611305)

All apps by John William: https://appshunter.io/developer/1112008883

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*