Comparison

KleverKey Classic vs Clex Key

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KleverKey Classic

Features
Read full description

KleverKey is the standard for secure and mobile access. The manufacturer independent access and permission management solution unifies all of your private and business-related permissions in one app. Through the use of the KleverKey app and Cloud, digital keys can be transmitted to and revoked from users easily and securely. All of this can be done remotely and in real time. All compatible products (door controllers, key safes, locking mechanisms) are marked with the KleverKey logo and can be integrated into your keychain with ease. The KleverKey cloud documents and displays all activities and permissions in a user friendly manner. Discover more at: classic.kleverkey.com KleverKey. Secure & Mobile Access.

About

Clex Key

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
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Welcome to the new Clex Key App 2! Uhlmann & Zacher presents the Clex Key App, which has been developed from scratch. More efficient communication to the locking units, more stable overall behavior and easy-to-use UI as well as better user guidance for invitation / authorization by the administrator characterize the new Clex Key App. With the Clex Key App, the electronic locking units of Uhlmann & Zacher can be opened and closed using the smartphone. In the process, the smartphone communicates with the locking units via Bluetooth® Low Energy. High security standards To ensure the necessary security, you will receive an invitation to set up your Clex Key app from the operator of the locking system by e-mail and also a short message on your phone. Only after confirming both parts of the invitation, your key can be used to open the locking units using your smartphone Functions: - Receive mobile keys and unlock doors via Bluetooth® - Execute block requests for the administrator

Screenshots

KleverKey Classic4 screens
Clex Key4 screens

Verdict

The call

The clearest difference is iOS requirement: KleverKey Classic at 10.0 against Clex Key's 16.0. On price, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

KleverKey Classic ships an update every 5 weeks, Clex Key every 2 months. The most recent releases landed on October 26, 2026 and October 8, 2026 respectively.

Scorecard1 real difference · 7 level
KleverKey Classic versus Clex Key: the parameters behind the verdict, then further details
ParameterKleverKey ClassicClex Key
PriceFreeFree
Positive reviews—50.0% of reviews
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad
Requires iOS10.0 — better16.0
Further details — not scored
Size64 MB18 MB
Age rating4+4+
DeveloperSwissprime Technologies AGUhlmann & Zacher GmbH

In-app purchases

None

KleverKey Classic

No in-app purchases

None

Clex Key

No in-app purchases

Questions

Is KleverKey Classic free?
KleverKey Classic is free to download, with no in-app purchases.
Is Clex Key free?
Clex Key is free to download, with no in-app purchases.
Do KleverKey Classic or Clex Key have ads?
Neither KleverKey Classic nor Clex Key shows ads.
Which is updated more often, KleverKey Classic or Clex Key?
KleverKey Classic ships an update every 5 weeks, and Clex Key every 2 months. Most recently, KleverKey Classic was updated on October 26, 2026 and Clex Key on October 8, 2026.

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