# 16文字日記 vs UCharm

The clearest difference is in-app purchases: 16文字日記 at none against UCharm's 1. 16文字日記 also leads on iOS requirement (15.0 vs 26.0). UCharm's advantage is ads (none vs shown) and update cadence (every 6 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. UCharm sells 1 in-app purchase, starting at $19.99 per month. 16文字日記 asks for nothing beyond the download.

16文字日記 ships an update every 2 months, UCharm every 6 days. Both last shipped on October 3, 2026.

## The numbers

| Metric | 16文字日記 | UCharm |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Ad-supported | — |
| Size | 75 MB | 13 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kenta Fukushima](https://appshunter.io/developer/1514527789) | [German Enrique Kamegawa](https://appshunter.io/developer/6797006416) |

## 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


### UCharm

[App page](https://appshunter.io/ios/app/ucharm/id6805957213)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UCharm Monthly | $19.99 | per month |


## 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 UCharm free?

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

### Do 16文字日記 or UCharm have ads?

16文字日記 shows ads; UCharm does not.

### Which is updated more often, 16文字日記 or UCharm?

16文字日記 ships an update every 2 months, and UCharm every 6 days. Most recently, 16文字日記 was updated on October 3, 2026 and UCharm on October 3, 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.*