# Fast100Math vs Brain Infinity

The clearest difference is in-app purchases: Fast100Math at none against Brain Infinity's 1. Brain Infinity's advantage is iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Brain Infinity sells 1 one-off in-app purchase. Fast100Math asks for nothing beyond the download.

Fast100Math ships an update every 3 days, Brain Infinity every 5 days. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Fast100Math | Brain Infinity |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 31 MB | 72 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [makoto amijima](https://appshunter.io/developer/1493994946) | [YUTA UEDA](https://appshunter.io/developer/1853129120) |

## What reviewers say

### Fast100Math

[App page](https://appshunter.io/ios/app/fast100math/id6739807220)

**Features:** macOS Compatibility

**In-app purchases:** none


### Brain Infinity

[App page](https://appshunter.io/ios/app/brain-infinity-mind-workout/id6755319401)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Fast100Math free?

Fast100Math is free to download, with no in-app purchases.

### Is Brain Infinity free?

Brain Infinity is free to download, with in-app purchases available.

### Do Fast100Math or Brain Infinity have ads?

Neither Fast100Math nor Brain Infinity shows ads.

### Which is updated more often, Fast100Math or Brain Infinity?

Fast100Math ships an update every 3 days, and Brain Infinity every 5 days. Most recently, Fast100Math was updated on October 14, 2026 and Brain Infinity 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.*