# A3S vs Mental Math Kingdom

The clearest difference is in-app purchases: A3S at none against Mental Math Kingdom's 1. A3S also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). Mental Math Kingdom's advantage is update cadence (daily vs every 2 weeks). On price and ads there is nothing between them.

Both are free to download. Mental Math Kingdom sells 1 one-off in-app purchase. A3S asks for nothing beyond the download.

A3S ships an update every 2 weeks, Mental Math Kingdom daily. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | A3S | Mental Math Kingdom |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Daily** |
| Size | 30 MB | 13 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Deccan Spark Technologies](https://appshunter.io/developer/1854388120) | [Hiroki Sekimoto](https://appshunter.io/developer/1877884860) |

## What reviewers say

### A3S

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

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

**In-app purchases:** none


### Mental Math Kingdom

[App page](https://appshunter.io/ios/app/mental-math-kingdom/id6787438808)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mental Math Kingdom Pro | $3.99 | one-time |


## Frequently asked questions

### Is A3S free?

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

### Is Mental Math Kingdom free?

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

### Do A3S or Mental Math Kingdom have ads?

Neither A3S nor Mental Math Kingdom shows ads.

### Which is updated more often, A3S or Mental Math Kingdom?

A3S ships an update every 2 weeks, and Mental Math Kingdom daily. Most recently, A3S was updated on October 24, 2026 and Mental Math Kingdom on October 11, 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.*