Firdaus Zahari

This plugin allows you to track all user devices used when logging in to your site. The user agent, login date/time, and logout date/time (if the users log out from the site) are tracked automatically and persisted into the database for later viewing.
You can find a list of all login devices available under the Users > Login Devices submenu.

FS Login Devices

Track and display all users devices used during authentication process

Katsushi Kawamori

Display the html written between the shortcode of each user agent.
<ul>
<li>Can add a shortcode attribute value and set the corresponding user agent.</li>
<li>Sibling plugin -> <a href="https://wordpress.org/plugins/useragent-themes-switcher/" rel="ugc">UserAgent Themes Switcher</a>.</li>
</ul>

UserAgent Content Switcher

Display the html written between the shortcode of each user agent.

FS Login Devices vs UserAgent Content Switcher