# Kukai vs Key Defender

The clearest difference is update cadence: Kukai at every 3 weeks against Key Defender's every 2 months. Kukai also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Kukai ships an update every 3 weeks, Key Defender every 2 months. The most recent releases landed on October 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Kukai | Key Defender |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/kukai/id1563851375/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 360 MB | 88 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [军 杨](https://appshunter.io/developer/1489139639) | [Shenzhen Ecartek Technology, Ltd.](https://appshunter.io/developer/994423482) |

## What reviewers say

### Kukai

[App page](https://appshunter.io/ios/app/kukai/id1563851375)

This application connects to automatic key cutting machines via Bluetooth. It allows users to decode, cut, duplicate keys, and create key profiles, aiming to improve efficiency for locksmiths globally.

**Highlights:** Bluetooth connectivity to machines, Key decoding, Key cutting, Key duplication, Key profile creation, Intelligent updates

**Features:** macOS Compatibility

**In-app purchases:** none


### Key Defender

[App page](https://appshunter.io/ios/app/key-defender/id6804600891)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kukai free?

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

### Is Key Defender free?

Key Defender is free to download, with no in-app purchases.

### Do Kukai or Key Defender have ads?

Neither Kukai nor Key Defender shows ads.

### Which is updated more often, Kukai or Key Defender?

Kukai ships an update every 3 weeks, and Key Defender every 2 months. Most recently, Kukai was updated on October 12, 2026 and Key Defender 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.*