# OneDay日記 vs Shared Diary

The clearest difference is in-app purchases: OneDay日記 at none against Shared Diary's 1. OneDay日記 also leads on ads (none vs shown) and device support (3 vs 1). Shared Diary's advantage is update cadence (fortnightly vs every 7 months). On price 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. OneDay日記 asks for nothing beyond the download.

OneDay日記 ships an update every 7 months, Shared Diary fortnightly. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | OneDay日記 | Shared Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 42 MB | 41 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Hiroki Sato](https://appshunter.io/developer/1514602166) | [Originate Aster, Inc.](https://appshunter.io/developer/1722580451) |

## What reviewers say

### OneDay日記

[App page](https://appshunter.io/ios/app/oneday/id1524208763)

**Features:** macOS Compatibility

**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 OneDay日記 free?

OneDay日記 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 OneDay日記 or Shared Diary have ads?

Shared Diary shows ads; OneDay日記 does not.

### Which is updated more often, OneDay日記 or Shared Diary?

OneDay日記 ships an update every 7 months, and Shared Diary fortnightly. Most recently, OneDay日記 was updated on September 19, 2026 and Shared Diary on September 24, 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.*