# 交換日記を誰とでも EXダイアリー vs コトアム

The clearest difference is review sentiment: コトアム at 67% against 交換日記を誰とでも EXダイアリー's 21%. 交換日記を誰とでも EXダイアリー's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

交換日記を誰とでも EXダイアリー ships an update every 2 weeks, コトアム every 3 weeks. The most recent releases landed on September 24, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | 交換日記を誰とでも EXダイアリー | コトアム |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 21.4% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 49 MB | 78 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Ryo Kuroki](https://appshunter.io/developer/1656216811) | [TOKYO DOME CORPORATION](https://appshunter.io/developer/1121904377) |

## What reviewers say

### 交換日記を誰とでも EXダイアリー

[App page](https://appshunter.io/ios/app/ex/id6444697825)

This app offers a unique, turn-based journaling experience for sharing daily life with friends, family, or even strangers. It aims to provide a more intimate and less overwhelming alternative to mainstream social media platforms.

**Highlights:** Turn-based diary entries, Share with friends or strangers, Alternative to mainstream SNS, Simple journaling interface, Future matching features planned

**Features:** Vision Pro support

**In-app purchases:** none


### コトアム

[App page](https://appshunter.io/ios/app/id6526468549)

A quiet literary social network for crafting and reading short literary works like tanka, essays, and novels. Users can create personal "playlists" of favorite pieces, share their own creations, and discover new literary gems.

**Highlights:** Create and share short literary works, Curate personal "playlists" of favorite pieces, Discover popular and user-made playlists, Supports various genres including tanka, novels, and essays, Automatic vertical layout generation for writing, Share creations to X (formerly Twitter)

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

**In-app purchases:** none


## Frequently asked questions

### Is 交換日記を誰とでも EXダイアリー free?

交換日記を誰とでも EXダイアリー is free to download, with no in-app purchases.

### Is コトアム free?

コトアム is free to download, with no in-app purchases.

### Do 交換日記を誰とでも EXダイアリー or コトアム have ads?

Neither 交換日記を誰とでも EXダイアリー nor コトアム shows ads.

### Which is updated more often, 交換日記を誰とでも EXダイアリー or コトアム?

交換日記を誰とでも EXダイアリー ships an update every 2 weeks, and コトアム every 3 weeks. Most recently, 交換日記を誰とでも EXダイアリー was updated on September 24, 2026 and コトアム on September 17, 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.*