business model and software licensing scheme in which the basic form of a product is free of charge, and access to additional features requires payment
Freemium is a business model, and a marketing term, used for digital products. It means that the base features of a product can be used without payment, but that more advanced features require payment.
This business model has been used in the software industry since the 1980s. A subset of this model used by the video game industry is called free-to-play.