Unfortunately, we do not have a native RokuTV app at this time. 

You can mirror your screen to your RokuTV. First enable Screen Mirroring (set to 'Always Allow') in your Roku TV's settings.

On Windows 10: 

-Click the Action Center button in the bottom right corner of your screen
-Select Connect - then choose your RokuTV

On Android: 

-Use the pulldown menu and select 'Screen Cast'. You should see your RokuTV listed.

-Once you have mirrored your screen to your TV use the LivePhish Android app and access your streams in the My Stash section of the app

On Mac or iOS:
There are several paid app options for Mac & iOS to mirror to Roku like Airbeam and APowerMirror.

To mirror from Mac to Roku for free:  download the RokuCast Chrome extension from THIS LINK and follow the instructions to install it and connect it to your Roku. Then use Chrome and cast your screen or video from your Mac to Roku

Unfortunately, it is not possible to mirror iOS devices to RokuTV with audio for free at this time.