# CoTan vs 記憶KEEPER

The clearest difference is ads: 記憶KEEPER at none against CoTan's shown. On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | CoTan | 記憶KEEPER |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | Every 3 days |
| Size | 28 MB | 4 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ryo Minebayashi](https://appshunter.io/developer/1854415357) | [nao watanabe](https://appshunter.io/developer/1896686911) |

## What reviewers say

### CoTan

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 記憶KEEPER

[App page](https://appshunter.io/ios/app/keeper/id6769772312)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CoTan free?

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

### Is 記憶KEEPER free?

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

### Do CoTan or 記憶KEEPER have ads?

CoTan shows ads; 記憶KEEPER does not.

### Which is updated more often, CoTan or 記憶KEEPER?

CoTan ships an update every 3 days, and 記憶KEEPER every 3 days. Most recently, CoTan was updated on October 12, 2026 and 記憶KEEPER 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.*