# Rapid mental arithmetic vs Broken Epoch

The clearest difference is iOS requirement: Rapid mental arithmetic at 13.0 against Broken Epoch's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rapid mental arithmetic ships an update every 3 weeks, Broken Epoch every 5 weeks. The most recent releases landed on October 3, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Rapid mental arithmetic | Broken Epoch |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 41 MB | 13 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gita Guha](https://appshunter.io/developer/1869265430) | [Brandon Martez Allen](https://appshunter.io/developer/6778241210) |

## What reviewers say

### Rapid mental arithmetic

[App page](https://appshunter.io/ios/app/rapid-mental-arithmetic/id6757849531)

**Features:** macOS Compatibility

**In-app purchases:** none


### Broken Epoch

[App page](https://appshunter.io/ios/app/broken-epoch-reflex-drill/id6778774804)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rapid mental arithmetic free?

Rapid mental arithmetic is free to download, with no in-app purchases.

### Is Broken Epoch free?

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

### Do Rapid mental arithmetic or Broken Epoch have ads?

Both Rapid mental arithmetic and Broken Epoch show ads.

### Which is updated more often, Rapid mental arithmetic or Broken Epoch?

Rapid mental arithmetic ships an update every 3 weeks, and Broken Epoch every 5 weeks. Most recently, Rapid mental arithmetic was updated on October 3, 2026 and Broken Epoch on October 18, 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.*