Roku devices give users the ability to stream content from hundreds of apps, but there are a handful of third-party apps that aren't compatible and don't appear automatically on the Roku Channels page. While Roku previously allowed users to sideload apps on their devices, this is no longer an option in 2021, meaning you can't technically sideload apps onto Roku boxes, streaming sticks, or Roku TVs. As such, the best way to stream third-party content is to cast or screen mirror from your phone to a Roku device. Here's what you need to do to cast or screen mirror to a Roku device. Casting on Roku The easiest workaround for streaming third-party content onto your Roku device is to use screencasting. This method works for users using both compatible iOS or Android devices. Here are the steps you need to follow. Make sure your mobile device or tablet and Roku device are connected to the same Wi-Fi network. Install the third-party app you want to stream from on your