RockCalendar
Single: If you build one website for one client you can choose the Single license.
Unlimited: If you build multiple websites for multiple clients you can either buy a Single license for each project or you buy the Unlimited license.
RockSuite/SaaS: If you build one website where multiple clients are charged for using that software then you need a RockSuite license for that project.
Are you wondering whether you can renew your licence or updates? Please read the terms and conditions for modules!