# ClexFWProg — Updates firmware of UZ devices

> Updates firmware of UZ devices (iPhone/iPad app by Uhlmann & Zacher GmbH.)

- Source: https://appshunter.io/ios/app/clexfwprog/id6470370699 (this page in markdown: same URL + `.md`)
- Developer: [Uhlmann & Zacher GmbH](https://appshunter.io/developer/1413776543)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 73 MB
- Languages: American English, German (Germany)
- Released: 2023-11-30
- Data updated: 2026-05-18
- User reviews in markdown: https://appshunter.io/ios/app/clexfwprog/id6470370699/reviews.md

## What is ClexFWProg?

With the ClexFWProg App, the firmware of the electronic locking units of Uhlmann & Zacher can be updated using the smartphone.

During the updating process, the smartphone communicates with the locking units via Bluetooth® Low Energy. Make sure you have the latest firmware features and security fixes by keeping the locking units up to date.

Other features:
- Service openings
- Battery position for battery change
- Disassembly position
- Toggle locks
- Setting real time clock


## Version history (last 5 releases)

### 3.4.1 — 2026-01-26

Fix position modes for ClexPrime

### 3.4.0 — 2025-12-02

Updated some libraries

### 2.0.21 — 2024-04-30

- FSM updates work now properly 
- Bug fixes and other optimizations

### 2.0.19 — 2024-04-15

- More U&Z devices are supported
- Downgrades are now also possible
- Several other fixes and optimizations

### 2.0.14 — 2023-12-10

- Updates of AVR Firmware enhanced & stabilized
- Removed disconnect after using a service function
- Smaller fixes and enhancements

## Apps similar to ClexFWProg

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [BlueID Keys](https://appshunter.io/ios/app/blueid-keys/id1050948083) | — | Free | Utilities |
| [DrM OTA](https://appshunter.io/ios/app/drm-ota/id1568520044) | — | Free | Utilities |
| [Airfob Pro](https://appshunter.io/ios/app/airfob-pro/id1659959609) | — | Free | Utilities |
| [Smart400](https://appshunter.io/ios/app/smart400/id1591387007) | — | Free | Utilities |
| [BlueID](https://appshunter.io/ios/app/blueid/id6472727881) | — | Free | Utilities |
| [VSG101 Update](https://appshunter.io/ios/app/vsg101-update/id1628054504) | — | Free | Utilities |

## More apps by Uhlmann & Zacher GmbH

- [Keyng](https://appshunter.io/ios/app/keyng/id1450613501)
- [Clex Key](https://appshunter.io/ios/app/clex-key/id1500405117)

All apps by Uhlmann & Zacher GmbH: https://appshunter.io/developer/1413776543

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-18.*