# Four Line Diary / ４行日記 vs シンプル3行日記

The clearest difference is ads: Four Line Diary / ４行日記 at none against シンプル3行日記's shown. Four Line Diary / ４行日記 also leads on iOS requirement (11.0 vs 17.0). 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.

Four Line Diary / ４行日記 ships an update every 4 days, シンプル3行日記 every 3 days. The most recent releases landed on September 24, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Four Line Diary / ４行日記 | シンプル3行日記 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 31 MB | 3 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [arai.me](https://appshunter.io/developer/1652629805) | [Searial, Inc.](https://appshunter.io/developer/1875914396) |

## What reviewers say

### Four Line Diary / ４行日記

[App page](https://appshunter.io/ios/app/four-line-diary/id6474243387)

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

**In-app purchases:** none


### シンプル3行日記

[App page](https://appshunter.io/ios/app/3/id6791351877)

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

**In-app purchases:** none


## Frequently asked questions

### Is Four Line Diary / ４行日記 free?

Four Line Diary / ４行日記 is free to download, with no in-app purchases.

### Is シンプル3行日記 free?

シンプル3行日記 is free to download, with no in-app purchases.

### Do Four Line Diary / ４行日記 or シンプル3行日記 have ads?

シンプル3行日記 shows ads; Four Line Diary / ４行日記 does not.

### Which is updated more often, Four Line Diary / ４行日記 or シンプル3行日記?

Four Line Diary / ４行日記 ships an update every 4 days, and シンプル3行日記 every 3 days. Most recently, Four Line Diary / ４行日記 was updated on September 24, 2026 and シンプル3行日記 on September 16, 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.*