# 16文字日記 vs 100 Year Diary Journal

The clearest difference is in-app purchases: 16文字日記 at none against 100 Year Diary Journal's 1. 100 Year Diary Journal's advantage is update cadence (every 3 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 100 Year Diary Journal sells 1 one-off in-app purchase. 16文字日記 asks for nothing beyond the download.

16文字日記 ships an update every 2 months, 100 Year Diary Journal every 3 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | 16文字日記 | 100 Year Diary Journal |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 75 MB | 63 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kenta Fukushima](https://appshunter.io/developer/1514527789) | [HARUKARY](https://appshunter.io/developer/1854608510) |

## What reviewers say

### 16文字日記

[App page](https://appshunter.io/ios/app/16/id6448646374)

This app allows users to record their daily thoughts and memories using only 16 characters. It's designed for those who find long journaling difficult or are short on time, making it easy to maintain a daily record and review past entries.

**Highlights:** 16-character daily entries, Monthly calendar view, Writing reminders, Passcode lock, Easy to continue daily

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

**In-app purchases:** none


### 100 Year Diary Journal

[App page](https://appshunter.io/ios/app/100-year-diary-journal/id6778656624)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $9.99 | one-time |


## Frequently asked questions

### Is 16文字日記 free?

16文字日記 is free to download, with no in-app purchases.

### Is 100 Year Diary Journal free?

100 Year Diary Journal is free to download, with in-app purchases available.

### Do 16文字日記 or 100 Year Diary Journal have ads?

Both 16文字日記 and 100 Year Diary Journal show ads.

### Which is updated more often, 16文字日記 or 100 Year Diary Journal?

16文字日記 ships an update every 2 months, and 100 Year Diary Journal every 3 days. Most recently, 16文字日記 was updated on October 24, 2026 and 100 Year Diary Journal on October 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.*