The app can now be added to 4K-capable Fire TV and Roku devices for 4K HDR streaming of sports.
The BT Sport app is now available on Fire TV, Android TV, Roku streaming players and Roku TV models, for the first time.
This adds to its existing availability on Samsung smart TV, NOW TV, Sony PlayStation, Xbox, Google Chromecast and Apple TV, as well as mobiles, tablets, BT TV, Sky, TalkTalk and Virgin Media.
From today, BT Sport customers with access to the app for large screen devices can access BT Sport on the new devices and platforms at no extra cost.
BT Sport customers with a 4K-capable Fire TV, Roku streaming device, or one of the 4K devices running Android TV such as selected TV sets manufactured by brands including Sony, Phillips, TCL, Sharp, Cello and JVC, will be able to access BT Sport Ultimate to view live sport in 4K with High Dynamic Range (HDR).
Anyone else wanting to access the BT Sport app can purchase a BT Sport Monthly Pass for £25 per month.
Andy Haworth, managing director, commercial, BT Sport, said: “BT continues to connect more viewers to BT Sport content, leading the market with innovative ways to watch. Sports fans can expect more exciting innovations over the coming new football and rugby seasons.”