# Crazy Hard Fast Math Reaction vs Heardle!

The clearest difference is price: Crazy Hard Fast Math Reaction at Free against Heardle!'s $4.99. Crazy Hard Fast Math Reaction also leads on review sentiment (27% vs 0%). Heardle!'s advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Crazy Hard Fast Math Reaction is free to download; Heardle! costs $4.99 up front. Crazy Hard Fast Math Reaction sells 1 one-off in-app purchase. Heardle! asks for nothing beyond the download.

## The numbers

| Metric | Crazy Hard Fast Math Reaction | Heardle! |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| 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** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | — |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#90** |
| Size | 48 MB | 27 MB |
| Requires iOS | **12.4** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fragranze Games Ltd](https://appshunter.io/developer/640751335) | [Quynh Dau](https://appshunter.io/developer/1477956929) |

## 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 |


### Heardle!

[App page](https://appshunter.io/ios/app/heardle/id6782384802)

**Currently charting:** #90 Top Paid · Music (US App Store)

Test your music knowledge by identifying songs from short audio snippets. Compete with friends daily or play unlimited rounds. Explore music across different decades.

**Highlights:** Daily music challenges, Unlimited play mode, Decades-themed playlists, Thousands of songs, Track performance, Share scores

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

**In-app purchases:** none


## 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 Heardle! free?

Heardle! costs $4.99, with no in-app purchases.

### Do Crazy Hard Fast Math Reaction or Heardle! have ads?

Crazy Hard Fast Math Reaction shows ads; Heardle! 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.*