# ストタン vs Prime Rush

The clearest difference is in-app purchases: ストタン at none against Prime Rush's 1. ストタン also leads on ads (none vs shown) and update cadence (every 2 days vs every 3 weeks). On price there is nothing between them.

Both are free to download. Prime Rush sells 1 one-off in-app purchase. ストタン asks for nothing beyond the download.

ストタン ships an update every 2 days, Prime Rush every 3 weeks. The most recent releases landed on October 30, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | ストタン | Prime Rush |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Size | 31 MB | 21 MB |
| Requires iOS | **15.1** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Yasunori Shigeta](https://appshunter.io/developer/1844134104) | [Ayumu Izumi](https://appshunter.io/developer/1822273057) |

## What reviewers say

### ストタン

[App page](https://appshunter.io/ios/app/id6755356553)

**Features:** macOS Compatibility

**In-app purchases:** none


### Prime Rush

[App page](https://appshunter.io/ios/app/prime-rush-math-time-attack/id6755986782)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan | $1.99 | one-time |


## Frequently asked questions

### Is ストタン free?

ストタン is free to download, with no in-app purchases.

### Is Prime Rush free?

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

### Do ストタン or Prime Rush have ads?

Prime Rush shows ads; ストタン does not.

### Which is updated more often, ストタン or Prime Rush?

ストタン ships an update every 2 days, and Prime Rush every 3 weeks. Most recently, ストタン was updated on October 30, 2026 and Prime Rush on October 26, 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.*