But you can also enjoy streaming movies and shows completely free of charge, thanks to a growing number of FAST services: Free Ad-supported Streaming Television. Out of all the FAST services out there, Tubi has a strong claim to be the most straightforward to use—everything’s just really simple. Screenshot: RokuThe Roku FAST service is available as part of the selection of apps on Roku streaming devices and TVs. You can then sign in and access a host of free content through the Roku website or through the official Roku apps for Android and iOS. The platform brands itself as offering “thoughtful entertainment,” and there’s a smaller selection here, with no live TV channels.