freemium

[ free-mee-uh m ]
/ ˈfri mi əm /

noun

a sales strategy, especially on the Internet, in which the basic product or service is free, but customers are charged for additional features and content.
such a product or service.

adjective

of or relating to a freemium: freemium games for smartphones.

Origin of freemium

2005–10; blend of free and premium