# Fast MathB vs Infinity

The clearest difference is update cadence: Fast MathB at every 6 days against Infinity's every 4 months. Fast MathB also leads on iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Fast MathB ships an update every 6 days, Infinity every 4 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fast MathB | Infinity |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 4 months |
| Size | 153 MB | 8 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Salih Hamouda](https://appshunter.io/developer/1564178940) | [Anand Raj R](https://appshunter.io/developer/514675684) |

## What reviewers say

### 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 |


### Infinity

[App page](https://appshunter.io/ios/app/infinity-basic-math-questions/id6748877343)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Host a Party (Lifetime) | $1.99 | one-time |


## Frequently asked questions

### Is Fast MathB free?

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

### Is Infinity free?

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

### Do Fast MathB or Infinity have ads?

Neither Fast MathB nor Infinity shows ads.

### Which is updated more often, Fast MathB or Infinity?

Fast MathB ships an update every 6 days, and Infinity every 4 months. Most recently, Fast MathB was updated on November 3, 2026 and Infinity on October 25, 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.*