Basically, a product is offered Free to Play (Freemium) and the user can decide if he wants to pay the money (Premium) for additional features, services, virtual or physical goods that expand the functionality of the game. In some cases, ads may be show to the users. Demoĭemo programs have a limited functionality for free, but charge for an advanced set of features or for the removal of advertisements from the program's interfaces. In some cases, all the functionality is disabled until the license is purchased. Demos are usually not time-limited (like Trial software) but the functionality is limited. Trial software allows the user to evaluate the software for a limited amount of time.
After that trial period (usually 15 to 90 days) the user can decide whether to buy the software or not.
Even though, most trial software products are only time-limited some also have feature limitations.
