
The trial version of the software allows the user to evaluate the software for limited amount of time. Demos are usually not limited in time (like trial versions), but their functionality is limited.

In some cases, all functionality is disabled prior to purchasing a license. Demoĭemo programs have limited functionality free, but charge for advanced features or for removing ads from program interfaces. In some cases, ads may be shown to users. In fact, the product is offered Free to Play (Freemium) and the user decides whether he wants to pay money (Premium) for additional features, services, virtual or physical goods that expand the functionality of the game. This license is commonly used for video games and allows users to download and play the game for free. the software is free to use, modify and redistribute. There are many different open source licenses, but they must all meet the definition of open source. Programs released under this license can be used free of charge for both personal and commercial purposes. Open source software is software with source code that anyone can test, modify or improve.
