# Sool vs Osushi211

The clearest difference is update cadence: Osushi211 at every 2 weeks against Sool's every 2 months. Sool's advantage is iOS requirement (17.0 vs 26.2). 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.

Sool ships an update every 2 months, Osushi211 every 2 weeks. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Sool | Osushi211 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 4 MB | 36 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Umit UZ](https://appshunter.io/developer/1842858860) | [Kawamata Koichiro](https://appshunter.io/developer/788575817) |

## What reviewers say

### Sool

[App page](https://appshunter.io/ios/app/sool-quick-mathematic-trainer/id6756207263)

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

**In-app purchases:** none


### Osushi211

[App page](https://appshunter.io/ios/app/osushi211/id6758653710)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sool free?

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

### Is Osushi211 free?

Osushi211 is free to download, with no in-app purchases.

### Do Sool or Osushi211 have ads?

Neither Sool nor Osushi211 shows ads.

### Which is updated more often, Sool or Osushi211?

Sool ships an update every 2 months, and Osushi211 every 2 weeks. Most recently, Sool was updated on October 8, 2026 and Osushi211 on October 1, 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.*