# Document Detection vs ChatCharm Keyboard

The clearest difference is in-app purchases: Document Detection at none against ChatCharm Keyboard's 2. ChatCharm Keyboard's advantage is update cadence (weekly vs every 5 weeks) and iOS requirement (15.6 vs 17.5). On price, ads and device support there is nothing between them.

Both are free to download. ChatCharm Keyboard sells 2 in-app purchases, starting at $19.99 per 7 days. Document Detection asks for nothing beyond the download.

Document Detection ships an update every 5 weeks, ChatCharm Keyboard weekly. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Document Detection | ChatCharm Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (46 ratings)](https://appshunter.io/ios/app/chatcharm-keyboard/id6769270795/reviews)** |
| Number of ratings | — | **46** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 14 MB | 99 MB |
| Requires iOS | 17.5 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [亚雯 雷](https://appshunter.io/developer/6788065392) |

## What reviewers say

### Document Detection

[App page](https://appshunter.io/ios/app/document-detection/id6511216739)

**Features:** macOS Compatibility

**In-app purchases:** none


### ChatCharm Keyboard

[App page](https://appshunter.io/ios/app/chatcharm-keyboard/id6769270795)

Enhance your writing with an AI-powered keyboard that assists with replies, rewrites, and proofreading. Communicate effortlessly across languages and manage text snippets efficiently for faster typing.

**Highlights:** AI-generated replies, Tone and style improvement, Real-time grammar and spelling check, Seamless translation, Clipboard management, Quick phrase shortcuts

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $19.99 | per 7 days |
| Yearly | $89.99 | per year |


## Frequently asked questions

### Is Document Detection free?

Document Detection is free to download, with no in-app purchases.

### Is ChatCharm Keyboard free?

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

### Do Document Detection or ChatCharm Keyboard have ads?

Both Document Detection and ChatCharm Keyboard show ads.

### Which is updated more often, Document Detection or ChatCharm Keyboard?

Document Detection ships an update every 5 weeks, and ChatCharm Keyboard weekly. Most recently, Document Detection was updated on October 5, 2026 and ChatCharm Keyboard on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*