# Kototsumugi vs Shadow Work

The clearest difference is in-app purchases: Kototsumugi at none against Shadow Work's 2. Kototsumugi also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Shadow Work sells 2 in-app purchases, starting at $4.99 per 7 days. Kototsumugi asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Kototsumugi | Shadow Work |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Size | 45 MB | 21 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Tomofumi Ueba](https://appshunter.io/developer/1636195782) | [Devanuj Nath](https://appshunter.io/developer/6780533110) |

## What reviewers say

### Kototsumugi

[App page](https://appshunter.io/ios/app/kototsumugi-ai-diary-chat/id6776285459)

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

**In-app purchases:** none


### Shadow Work

[App page](https://appshunter.io/ios/app/shadow-work-umbra/id6780533108)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Yearly | $39.99 | per year |


## Frequently asked questions

### Is Kototsumugi free?

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

### Is Shadow Work free?

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

### Do Kototsumugi or Shadow Work have ads?

Neither Kototsumugi nor Shadow Work shows ads.

### Which is updated more often, Kototsumugi or Shadow Work?

Kototsumugi ships an update every 3 days, and Shadow Work every 3 days. Most recently, Kototsumugi was updated on November 5, 2026 and Shadow Work on November 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.*