# OSIRO オシロ vs コトアム

The clearest difference is review sentiment: コトアム at 67% against OSIRO オシロ's 10%. コトアム also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18). 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.

OSIRO オシロ ships an update fortnightly, コトアム every 3 weeks. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | OSIRO オシロ | コトアム |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/osiro/id1455458052/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 10.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 16 MB | 78 MB |
| Requires iOS | 18 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [OSIRO K.K.](https://appshunter.io/developer/1455458051) | [TOKYO DOME CORPORATION](https://appshunter.io/developer/1121904377) |

## What reviewers say

### OSIRO オシロ

[App page](https://appshunter.io/ios/app/osiro/id1455458052)

This companion app enhances the experience of using a community management platform. It centralizes content, blogs, groups, chats, and events, improving communication quality for fan or internal communities. Push notifications and multi-community switching are key features.

**Highlights:** Push notifications, Multi-community switching, Centralized content, Blog and group integration, Event management, Cross-device synchronization

**Features:** macOS Compatibility, 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 OSIRO オシロ free?

OSIRO オシロ 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 OSIRO オシロ or コトアム have ads?

Neither OSIRO オシロ nor コトアム shows ads.

### Which is updated more often, OSIRO オシロ or コトアム?

OSIRO オシロ ships an update fortnightly, and コトアム every 3 weeks. Most recently, OSIRO オシロ was updated on October 10, 2026 and コトアム on October 5, 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.*