# 睡眠ドッグ vs Shared Diary

The clearest difference is in-app purchases: 睡眠ドッグ at none against Shared Diary's 1. 睡眠ドッグ also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Shared Diary sells 1 in-app purchase, starting at $2.99 per month. 睡眠ドッグ asks for nothing beyond the download.

睡眠ドッグ ships an update every 2 weeks, Shared Diary fortnightly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 睡眠ドッグ | Shared Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 9 MB | 41 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Hayato Kitaoka](https://appshunter.io/developer/1634161426) | [Originate Aster, Inc.](https://appshunter.io/developer/1722580451) |

## What reviewers say

### 睡眠ドッグ

[App page](https://appshunter.io/ios/app/id6475922311)

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

**In-app purchases:** none


### Shared Diary

[App page](https://appshunter.io/ios/app/shared-diary/id6741321954)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Proプラン(1か月間) | $2.99 | per month |


## Frequently asked questions

### Is 睡眠ドッグ free?

睡眠ドッグ is free to download, with no in-app purchases.

### Is Shared Diary free?

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

### Do 睡眠ドッグ or Shared Diary have ads?

Shared Diary shows ads; 睡眠ドッグ does not.

### Which is updated more often, 睡眠ドッグ or Shared Diary?

睡眠ドッグ ships an update every 2 weeks, and Shared Diary fortnightly. Most recently, 睡眠ドッグ was updated on October 27, 2026 and Shared Diary on October 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.*