# CA4K vs ZOUI

The clearest difference is update cadence: ZOUI at every 5 weeks against CA4K's every 54 months. 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.

CA4K ships an update every 54 months, ZOUI every 5 weeks. The most recent releases landed on October 22, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | CA4K | ZOUI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.1 (11 ratings)](https://appshunter.io/ios/app/ca4k/id1491432558/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 0 MB | 48 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NAPCO Security Technologies](https://appshunter.io/developer/397342490) | [ZINWELL CORPORATION](https://appshunter.io/developer/1019370251) |

## What reviewers say

### CA4K

[App page](https://appshunter.io/ios/app/ca4k/id1491432558)

This app provides mobile access control for enterprise entry points like doors and elevators. Users can customize their approved access points and gain entry without physical credentials. It also offers optional administrator functions for system management.

**Highlights:** Mobile access to doors and elevators, Customize approved entry points, Log access without physical credentials, Administrator functions for system management, Enterprise electronic access control

**Features:** macOS Compatibility

**In-app purchases:** none


### ZOUI

[App page](https://appshunter.io/ios/app/zoui/id6599838167)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CA4K free?

CA4K is free to download, with no in-app purchases.

### Is ZOUI free?

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

### Do CA4K or ZOUI have ads?

Neither CA4K nor ZOUI shows ads.

### Which is updated more often, CA4K or ZOUI?

CA4K ships an update every 54 months, and ZOUI every 5 weeks. Most recently, CA4K was updated on October 22, 2026 and ZOUI on October 17, 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.*