4oD is now available on Sky's NOW TV Box and can be downloaded, free, from the Roku Channel Store.
Gidon Katz, Director of NOW TV, welcomed the latest addition to its NOW TV Box catch-up bouquet, which includes BBC iPlayer and Demand 5.
"There is now even more to watch. The launch of 4oD means the NOW TV Box delivers an even bigger choice of on-demand TV," he stated.
"It’s available alongside flexible pay-as-you-go access to must-see sport, the latest movies you missed at the cinema and the TV shows everyone’s talking about."
Laurence Dawkin-Jones, Director of Commercial and Business Development at Channel 4, said the broadcaster is always looking for new ways to offer its content to viewers.
"Bringing 4oD on the NOW TV Box represents the latest device launch in a busy year for Channel 4 that has seen us extend our content reach to many new platforms," he stated.
It's worth noting NOW TV recently launched an Entertainment Pass for £4.99 per month. This includes Sky1, Sky Atlantic, Sky Arts and Disney Channel.