WPSOLR is a free plugin, which you can enhance with a subscription pack.
You first buy a subscription. On the subscription order, you choose one or more packs with the number of WordPress websites where you want to activate the pack.
For instance, let’s imagine you want to boost your search on 3 of your websites. One of them is multilingual (wpml) and uses the WooCommerce plugin. Another website is multilingual and uses the ACF plugin.
The following screens show the order of a subscription, configured with packs, starting from the plugin admin screens. The same screens apply to the Pricing page.
A wpsolr pack is requested to activate some feature of WPSOLR
A pack description popup window appears when clicking on the restricted functionality
Order page of a subscription, start of configuration of packs
Order screen: add more licenses to the base pack (click on “edit button”)