A “user” essentially refers to a registered WordPress user account that accesses FooSales, so for example, if a few different people share the same login details then that counts as a single “user” but if the same people will be accessing FooSales from individual accounts, we classify them as “multiple users”.
You can add additional users to any plan with the FooSales User Add-on
Similarly for devices, the license is not linked to a particular device and FooSales can be used concurrently on different devices/machines at a given point in time based on the limit specified in the plan type.
You can add additional devices to any plan with the FooSales Device Add-on
Please refer to our pricing page for current plans and pricing.