# CoTan vs 覚えよう百人一首

The clearest difference is in-app purchases: CoTan at none against 覚えよう百人一首's 1. CoTan also leads on update cadence (every 3 days vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 覚えよう百人一首 sells 1 one-off in-app purchase. CoTan asks for nothing beyond the download.

CoTan ships an update every 3 days, 覚えよう百人一首 every 4 months. The most recent releases landed on October 12, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | CoTan | 覚えよう百人一首 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 4 months |
| Size | 28 MB | 47 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ryo Minebayashi](https://appshunter.io/developer/1854415357) | [Koji Murata](https://appshunter.io/developer/875202476) |

## What reviewers say

### CoTan

[App page](https://appshunter.io/ios/app/cotan/id6755531559)

**Features:** macOS Compatibility

**In-app purchases:** none


### 覚えよう百人一首

[App page](https://appshunter.io/ios/app/id6761998472)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告の削除 | $1.99 | one-time |


## Frequently asked questions

### Is CoTan free?

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

### Is 覚えよう百人一首 free?

覚えよう百人一首 is free to download, with in-app purchases available.

### Do CoTan or 覚えよう百人一首 have ads?

Both CoTan and 覚えよう百人一首 show ads.

### Which is updated more often, CoTan or 覚えよう百人一首?

CoTan ships an update every 3 days, and 覚えよう百人一首 every 4 months. Most recently, CoTan was updated on October 12, 2026 and 覚えよう百人一首 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.*