# こいぶみ｜カップルの手紙と交換日記 vs Memkeep

The clearest difference is in-app purchases: こいぶみ｜カップルの手紙と交換日記 at none against Memkeep's 1. こいぶみ｜カップルの手紙と交換日記 also leads on update cadence (every 3 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Memkeep sells 1 one-off in-app purchase. こいぶみ｜カップルの手紙と交換日記 asks for nothing beyond the download.

こいぶみ｜カップルの手紙と交換日記 ships an update every 3 days, Memkeep every 3 weeks. The most recent releases landed on September 17, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | こいぶみ｜カップルの手紙と交換日記 | Memkeep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Size | 120 MB | 92 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Shunya Iwasaki](https://appshunter.io/developer/1796095304) | [Burak Harun YILDIZ](https://appshunter.io/developer/1789220188) |

## What reviewers say

### こいぶみ｜カップルの手紙と交換日記

[App page](https://appshunter.io/ios/app/id6760828199)

**In-app purchases:** none


### Memkeep

[App page](https://appshunter.io/ios/app/memkeep-shared-journal/id6761391819)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Notebook | $4.99 | one-time |


## Frequently asked questions

### Is こいぶみ｜カップルの手紙と交換日記 free?

こいぶみ｜カップルの手紙と交換日記 is free to download, with no in-app purchases.

### Is Memkeep free?

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

### Do こいぶみ｜カップルの手紙と交換日記 or Memkeep have ads?

Neither こいぶみ｜カップルの手紙と交換日記 nor Memkeep shows ads.

### Which is updated more often, こいぶみ｜カップルの手紙と交換日記 or Memkeep?

こいぶみ｜カップルの手紙と交換日記 ships an update every 3 days, and Memkeep every 3 weeks. Most recently, こいぶみ｜カップルの手紙と交換日記 was updated on September 17, 2026 and Memkeep on September 28, 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.*