# Clex Key vs DoorSec

The clearest difference is update cadence: Clex Key at every 2 months against DoorSec's every 4 months. DoorSec's advantage is iOS requirement (13.0 vs 16.0). 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.

Clex Key ships an update every 2 months, DoorSec every 4 months. The most recent releases landed on September 21, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Clex Key | DoorSec |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | — |
| Size | 18 MB | 12 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Uhlmann & Zacher GmbH](https://appshunter.io/developer/1413776543) | [Telenot Electronic GmbH](https://appshunter.io/developer/401623741) |

## What reviewers say

### Clex Key

[App page](https://appshunter.io/ios/app/clex-key/id1500405117)

This app allows you to open and close electronic locking units using your smartphone via Bluetooth Low Energy. It ensures high security through a two-part invitation confirmation process. The updated version offers more efficient communication, stable performance, and an improved user interface.

**Highlights:** Unlock doors via Bluetooth, Receive mobile keys, Efficient communication with locking units, Improved user guidance, High security standards, Execute block requests

**Features:** macOS Compatibility

**In-app purchases:** none


### DoorSec

[App page](https://appshunter.io/ios/app/doorsec/id1541990693)

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

**In-app purchases:** none


## Frequently asked questions

### Is Clex Key free?

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

### Is DoorSec free?

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

### Do Clex Key or DoorSec have ads?

Neither Clex Key nor DoorSec shows ads.

### Which is updated more often, Clex Key or DoorSec?

Clex Key ships an update every 2 months, and DoorSec every 4 months. Most recently, Clex Key was updated on September 21, 2026 and DoorSec on August 23, 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.*