# Practice mental arithmetic vs A3S

The clearest difference is update cadence: A3S at every 2 weeks against Practice mental arithmetic's every 5 weeks. Practice mental arithmetic's advantage is iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Practice mental arithmetic ships an update every 5 weeks, A3S every 2 weeks. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Practice mental arithmetic | A3S |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Size | 22 MB | 30 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitry Korchagin](https://appshunter.io/developer/1037103262) | [Deccan Spark Technologies](https://appshunter.io/developer/1854388120) |

## What reviewers say

### Practice mental arithmetic

[App page](https://appshunter.io/ios/app/practice-mental-arithmetic/id1495163369)

**Features:** macOS Compatibility

**In-app purchases:** none


### A3S

[App page](https://appshunter.io/ios/app/a3s-student/id6778335848)

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

**In-app purchases:** none


## Frequently asked questions

### Is Practice mental arithmetic free?

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

### Is A3S free?

A3S is free to download, with no in-app purchases.

### Do Practice mental arithmetic or A3S have ads?

Neither Practice mental arithmetic nor A3S shows ads.

### Which is updated more often, Practice mental arithmetic or A3S?

Practice mental arithmetic ships an update every 5 weeks, and A3S every 2 weeks. Most recently, Practice mental arithmetic was updated on October 3, 2026 and A3S on October 7, 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.*