# Simplified Diary vs OneDay日記

The clearest difference is ads: OneDay日記 at none against Simplified Diary's shown. Simplified Diary's advantage is iOS requirement (12.0 vs 15.6). On price, update cadence, in-app purchases and device support there is nothing between them.

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

Simplified Diary ships an update every 8 months, OneDay日記 every 7 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Simplified Diary | OneDay日記 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | **Every 7 months** |
| Size | 19 MB | 42 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Kazuya Fujita](https://appshunter.io/developer/1358322690) | [Hiroki Sato](https://appshunter.io/developer/1514602166) |

## What reviewers say

### Simplified Diary

[App page](https://appshunter.io/ios/app/simplified-diary-simple-app/id1489815672)

**In-app purchases:** none


### OneDay日記

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Simplified Diary free?

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

### Is OneDay日記 free?

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

### Do Simplified Diary or OneDay日記 have ads?

Simplified Diary shows ads; OneDay日記 does not.

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

Simplified Diary ships an update every 8 months, and OneDay日記 every 7 months. Most recently, Simplified Diary was updated on October 25, 2026 and OneDay日記 on October 25, 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.*