# Sigma CVI vs Quick Kibo

The clearest difference is in-app purchases: Sigma CVI at none against Quick Kibo's 4. Sigma CVI also leads on iOS requirement (11.0 vs 17.0). Quick Kibo's advantage is update cadence (every 8 days vs every 15 months). On price, ads and device support there is nothing between them.

Both are free to download. Quick Kibo sells 4 in-app purchases, starting at $2.99 per 7 days. Sigma CVI asks for nothing beyond the download.

Sigma CVI ships an update every 15 months, Quick Kibo every 8 days. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Sigma CVI | Quick Kibo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quick-kibo-custom-keyboard/id6791442323/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 22 MB | 345 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 12+ | 4+ |
| Developer | [ID&A S.r.l.](https://appshunter.io/developer/1446283055) | [Weiyanda (Shanghai) Information Technology Co., Ltd.](https://appshunter.io/developer/6773538640) |

## What reviewers say

### Sigma CVI

[App page](https://appshunter.io/ios/app/sigma-cvi/id1554823358)

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

**In-app purchases:** none


### Quick Kibo

[App page](https://appshunter.io/ios/app/quick-kibo-custom-keyboard/id6791442323)

Personalize your typing experience with customizable themes, keycaps, and mechanical sound effects. Enhance your typing with intelligent suggestions and multilingual support. Enjoy a visually and audibly unique keyboard.

**Highlights:** Customizable themes and keycaps, Mechanical and melodic key sounds, Reactive RGB backlight, Intelligent typing suggestions, Multilingual support, Saved phrases and fancy text styles

**Features:** Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kibo Pro Weekly | $2.99 | per 7 days |
| Kibo Pro Monthly | $6.99 | per month |
| Kibo Pro Yearly | $49.99 | per year |
| Kibo Pro | $199.99 | one-time |


## Frequently asked questions

### Is Sigma CVI free?

Sigma CVI is free to download, with no in-app purchases.

### Is Quick Kibo free?

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

### Do Sigma CVI or Quick Kibo have ads?

Neither Sigma CVI nor Quick Kibo shows ads.

### Which is updated more often, Sigma CVI or Quick Kibo?

Sigma CVI ships an update every 15 months, and Quick Kibo every 8 days. Most recently, Sigma CVI was updated on October 25, 2026 and Quick Kibo on October 29, 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.*