Login One! Business Edition for Joomla! 4
For personal and business use. Support provided.
Current version 1.0.2. Compatible with Joomla! 4.2.9. Compatible with PHP 8.0.15 or later.
Updates through the Joomla! update system.
Purchase includes one (1) year free updates.

For more information see here
Demo of J3 version: see here or our Youtube Channel.

Update/migrate from J3 version to J4 version?
It is not possible to upgrade or migrate your present Login One! J3 version to a J4 version. This means that you will have to completely re-install the J4 version on your J4 website.

Login One! is an authentication plug-in that prevents multiple log-ins by the same user credentials, for both frontend and backend. A useful tool for websites that share or exchange potentially sensitive information amongst their registered users.
User needs to either sign off the first session, or wait until the first session has expired.
Super Users can always have multiple log-ins.

The business edition comes with many additional options:

• Instead of denying access, user accounts can be disabled (blocked);
• Specific user groups and user IDs can be allowed or denied multiple log-ins;
• ID/IP combinations can be allowed/denied multiple log-ins;
• The maximum number of simultaneuous log-ins for 'allowed users' can be configured;
• How to handle an attempted multiple login can be configured: display a warning message, redirect to an article, or redirect to a web page.
• and much more...

The Business Edition is a 'must' for professional websites, because it delivers so much flexibility.

Install or upgrade via Joomla! backend.

System requirements:

• Joomla! 4.x only. Joomla! 4.2 or later
• PHP 8.0.15 or later;
• Standard Joomla! log-in form enabled and in use as the log-in gate;
• Browser has cookies enabled.

Basic setup instructions are here. These are also in the documentation that comes with the download package.
Please note that the plug-in must be installed as a package. The package will install three separate plug-ins.
Configuration overview: see here

Supported languages: Front-end: configurable. Back-end: English.

IMPORTANT NOTE WHEN USING OTHER 3RD PARTY PLUG-INS AND OTHER EXTENSIONS
Authentication and user plug-ins can be critical. The use of additional 3rd party (i.e. additional to a standard Joomla! install) authentication and user plug-ins, templates or other extensions may turn the Login One! software partly or totally ineffective, meaning that it will not - or only partly - perform the tasks for which it has been designed. 3rd Party templates may not display the plug-in notifications properly. In order to avoid disappointment, we recommend that you always test the Freeware Edition before purchasing a commercial edition.

License: License terms are here.
Support: Extended support. Support terms are here. You may find the answer to your question on our forum.

Trouble Shooting guide: see here
Refund and discount policy: see here.

You may want to try the free Trial Edition first. The Trial Edition is very basic and not configurable.