# Fast Math vs Decodey

The clearest difference is in-app purchases: Decodey at none against Fast Math's 10. Decodey also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Fast Math sells 10 in-app purchases, starting at $3.99 per month. Decodey asks for nothing beyond the download.

## The numbers

| Metric | Fast Math | Decodey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fast-math-mental-math-games/id6758257973/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 days | — |
| Monetization | Freemium | — |
| Size | 9 MB | 32 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Youssef Ziat](https://appshunter.io/developer/1871790298) | [Kritesh Singh](https://appshunter.io/developer/6786153669) |

## What reviewers say

### Fast Math

[App page](https://appshunter.io/ios/app/fast-math-mental-math-games/id6758257973)

Engage in quick, enjoyable mental math exercises and puzzles to sharpen your cognitive skills. Compete with others, track your progress, and unlock new challenges as you advance through various difficulty levels.

**Highlights:** Daily 3-minute brain training sessions, Variety of math and memory puzzles, Competitive duels and tournaments, Adaptive difficulty levels, Progress tracking and stats, Multiple question types

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fast Math Pro Monthly | $3.99 | per month |
| Fast Math Pro Weekly | $4.99 | per 7 days |
| Fast Math Monthly | $4.99 | per month |
| Fast Math Pro Yearly | $14.99 | per year |
| Fast Math Yearly | $19.99 | per year |
| 500 Coins | $2.99 | one-time |
| 1500 Coins | $6.99 | one-time |
| 4000 Coins | $14.99 | one-time |
| Fast Math Pro Lifetime | $29.99 | one-time |
| Lifetime Access | $29.99 | one-time |


### Decodey

[App page](https://appshunter.io/ios/app/decodey-tech-word-a-day/id6786153667)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fast Math free?

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

### Is Decodey free?

Decodey is free to download, with no in-app purchases.

### Do Fast Math or Decodey have ads?

Neither Fast Math nor Decodey 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.*