We are currently developing native apps for Amazon fire, Roku, and Apple TV. In the meantime, you can still watch Kokotree content on your television.
TV Web Browser
If your television is connected to the Internet and has a web browser, simply visit kokotree.com and login to your account.
Use AirPlay to stream or share content from your Apple devices to your Apple TV, AirPlay 2-compatible smart TV, or Mac. Learn how: Use AirPlay to stream video or mirror the screen of your iPhone, iPad, or iPod touch
See instructions from Google on how to do this: Cast movies & shows to a TV
Check out this helpful article from Makeuseof.com for instructions on how to cast Kokotree to Amazon fire from your Windows PC, Android, and IOS devices. See: How to Cast to an Amazon Fire Stick
Visit this page and instructions provided by Roku, where they explain how to screen mirror your android or windows phone to your Roku streaming device: How to screen mirror your Android™ or Windows® phone to your Roku® streaming device