# AI Keyboard vs Amethyst Authenticator

The clearest difference is in-app purchases: Amethyst Authenticator at none against AI Keyboard's 3. Amethyst Authenticator also leads on update cadence (every 3 days vs every 9 days). AI Keyboard's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.2). On price and ads there is nothing between them.

Both are free to download. AI Keyboard sells 3 in-app purchases, starting at $4.99 per month. Amethyst Authenticator asks for nothing beyond the download.

AI Keyboard ships an update every 9 days, Amethyst Authenticator every 3 days. The most recent releases landed on September 8, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | AI Keyboard | Amethyst Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (45 ratings)](https://appshunter.io/ios/app/ai-keyboard-smartboard/id6450285666/reviews)** | — |
| Number of ratings | **45** | — |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 3 days** |
| Monetization | Freemium | — |
| Size | 71 MB | 3 MB |
| Requires iOS | **15.6** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Hamsters Technology](https://appshunter.io/developer/1684075068) | [Mia Lina Koring](https://appshunter.io/developer/1752380606) |

## What reviewers say

### AI Keyboard

[App page](https://appshunter.io/ios/app/ai-keyboard-smartboard/id6450285666)

Enhance your writing with an AI-powered keyboard. Generate text, rephrase content, translate languages, and get quick replies directly from your keyboard. Boost productivity with intelligent assistance.

**Highlights:** AI text generation, Content rephrasing and elaboration, Instant email replies, Multilingual translation, Intuitive response preview, Direct text insertion

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pass | $4.99 | per month |
| Yearly Pass | $24.99 | per year |
| Lifetime | $39.99 | one-time |


### Amethyst Authenticator

[App page](https://appshunter.io/ios/app/amethyst-authenticator/id6743655651)

**In-app purchases:** none


## Frequently asked questions

### Is AI Keyboard free?

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

### Is Amethyst Authenticator free?

Amethyst Authenticator is free to download, with no in-app purchases.

### Do AI Keyboard or Amethyst Authenticator have ads?

Neither AI Keyboard nor Amethyst Authenticator shows ads.

### Which is updated more often, AI Keyboard or Amethyst Authenticator?

AI Keyboard ships an update every 9 days, and Amethyst Authenticator every 3 days. Most recently, AI Keyboard was updated on September 8, 2026 and Amethyst Authenticator on September 20, 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.*