# Specific Dimension vs AI Keyboard

The clearest difference is in-app purchases: Specific Dimension at none against AI Keyboard's 2. Specific Dimension also leads on iOS requirement (13.0 vs 15.6). AI Keyboard's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. AI Keyboard sells 2 in-app purchases, starting at $4.99 per 7 days. Specific Dimension asks for nothing beyond the download.

Specific Dimension ships an update every 2 months, AI Keyboard every 3 weeks. The most recent releases landed on October 26, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Specific Dimension | AI Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ai-keyboard-writing-assist/id6747170564/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 33 MB | 61 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Specific Dimension](https://appshunter.io/developer/1470130216) | [Stephen Kuyper](https://appshunter.io/developer/1699577318) |

## What reviewers say

### Specific Dimension

[App page](https://appshunter.io/ios/app/specific-dimension/id1470130217)

**In-app purchases:** none


### AI Keyboard

[App page](https://appshunter.io/ios/app/ai-keyboard-writing-assist/id6747170564)

Enhance your writing with an AI-powered keyboard that offers real-time grammar correction, text translation, and smart suggestions. Improve clarity, adjust tone, and rephrase messages effortlessly within any app.

**Highlights:** AI Writing Assistant, Grammar & Spell Checker, Instant Translation, Message Tone Editor, Paraphrasing & Rewriting, Smart Text Completion, Multi-App Support

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Yearly Subscriptions | $49.99 | per year |


## Frequently asked questions

### Is Specific Dimension free?

Specific Dimension is free to download, with no in-app purchases.

### Is AI Keyboard free?

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

### Do Specific Dimension or AI Keyboard have ads?

Neither Specific Dimension nor AI Keyboard shows ads.

### Which is updated more often, Specific Dimension or AI Keyboard?

Specific Dimension ships an update every 2 months, and AI Keyboard every 3 weeks. Most recently, Specific Dimension was updated on October 26, 2026 and AI Keyboard on October 6, 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.*