# W Keyboard AI Assistant vs 4invoice

The clearest difference is in-app purchases: 4invoice at none against W Keyboard AI Assistant's 3. W Keyboard AI Assistant's advantage is update cadence (every 6 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. W Keyboard AI Assistant sells 3 in-app purchases, starting at $3.99 per 7 days. 4invoice asks for nothing beyond the download.

W Keyboard AI Assistant ships an update every 6 weeks, 4invoice every 3 months. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | W Keyboard AI Assistant | 4invoice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (39 ratings)](https://appshunter.io/ios/app/w-keyboard-ai-assistant/id6446279310/reviews)** | — |
| Number of ratings | **39** | — |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 47 MB | 31 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wowoo Dijital Hizmetler Limited Sirketi](https://appshunter.io/developer/1607753160) | [Cuspy Software LLC](https://appshunter.io/developer/1538914569) |

## What reviewers say

### W Keyboard AI Assistant

[App page](https://appshunter.io/ios/app/w-keyboard-ai-assistant/id6446279310)

Enhance your writing with an AI-powered keyboard that offers grammar correction, paraphrasing, and text style adjustments. Effortlessly shorten, casualize, formalize, or simplify your messages. Add emojis, slang, and idioms to make your communication more engaging.

**Highlights:** AI-powered writing assistance, Grammar and spell correction, Text paraphrasing and style adjustment, Sentence shortening and simplification, Formalization and casualization of text, Emojify and text lingo options

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Keyboard Extension & Typer | $3.99 | per 7 days |
| AI Keyboard Extension & Typer | $3.99 | per 7 days |
| All Access | $19.99 | per year |


### 4invoice

[App page](https://appshunter.io/ios/app/4invoice/id6759964957)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is W Keyboard AI Assistant free?

W Keyboard AI Assistant is free to download, with in-app purchases available.

### Is 4invoice free?

4invoice is free to download, with no in-app purchases.

### Do W Keyboard AI Assistant or 4invoice have ads?

Neither W Keyboard AI Assistant nor 4invoice shows ads.

### Which is updated more often, W Keyboard AI Assistant or 4invoice?

W Keyboard AI Assistant ships an update every 6 weeks, and 4invoice every 3 months. Most recently, W Keyboard AI Assistant was updated on November 7, 2026 and 4invoice on October 31, 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.*