Kukai vs Key Defender
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kukai
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.
- Bluetooth connectivity to machines
- Key decoding
- Key cutting
- Key duplication
- Key profile creation
- Intelligent updates
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Kukai App is used for controlling automatic key cutting machines. The App connects with machine via Bluetooth and supports to decode, cut, duplicate keys and create key profile. The App will be update intelligently and make the locksmiths from all over the world work more easily and efficiently.
Key Defender
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A remote‑control signal jammer that blocks various remote‑control data signals
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Kukai | Key Defender |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 360 MB | 88 MB |
| Age rating | 4+ | 4+ |
| Developer | 军 杨 | Shenzhen Ecartek Technology, Ltd. |
In-app purchases
Kukai
No in-app purchases
Key Defender
No in-app purchases
