# Crazy Hard Fast Math Reaction vs Fast MathB

The clearest difference is ads: Fast MathB at none against Crazy Hard Fast Math Reaction's shown. Fast MathB also leads on update cadence (every 6 days vs every 11 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Crazy Hard Fast Math Reaction sells 1 one-off in-app purchase and Fast MathB sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Crazy Hard Fast Math Reaction ships an update every 11 months, Fast MathB every 6 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Crazy Hard Fast Math Reaction | Fast MathB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.7 (29 ratings)](https://appshunter.io/ios/app/crazy-hard-fast-math-reaction/id877393958/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 27.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 153 MB |
| Requires iOS | 12.4 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Fragranze Games Ltd](https://appshunter.io/developer/640751335) | [Salih Hamouda](https://appshunter.io/developer/1564178940) |

## What reviewers say

### Crazy Hard Fast Math Reaction

[App page](https://appshunter.io/ios/app/crazy-hard-fast-math-reaction/id877393958)

Test your math skills with an infinite number of calculations. Choose your difficulty and race against the clock to achieve a high score. Compete with friends on multiple leaderboards to prove your math prowess.

**Highlights:** Infinite math calculations, Two-button right/wrong input, Timed challenges, Difficulty options (easy, normal, hard), Multiple leaderboards, Multiplayer competition

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Fast MathB

[App page](https://appshunter.io/ios/app/fast-mathb/id6447488960)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pack1 | $0.99 | one-time |
| vip1 | $0.99 | one-time |
| pack3 | $2.99 | one-time |
| vip3 | $2.99 | one-time |
| pack5 | $4.99 | one-time |


## Frequently asked questions

### Is Crazy Hard Fast Math Reaction free?

Crazy Hard Fast Math Reaction is free to download, with in-app purchases available.

### Is Fast MathB free?

Fast MathB is free to download, with in-app purchases available.

### Do Crazy Hard Fast Math Reaction or Fast MathB have ads?

Crazy Hard Fast Math Reaction shows ads; Fast MathB does not.

### Which is updated more often, Crazy Hard Fast Math Reaction or Fast MathB?

Crazy Hard Fast Math Reaction ships an update every 11 months, and Fast MathB every 6 days. Most recently, Crazy Hard Fast Math Reaction was updated on October 22, 2026 and Fast MathB on October 24, 2026.

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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.*