Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
The Spectrum TV app is not available on Android based streaming players, so no Fire TV or Shield. It is available on the Chromecast, Samsung TVs, XBox One and Apple TV. You can also get it on Android based phones and tablets, and iOS devices. Right now those are your only choices.
Remember that it isn't in Spectrum's best interest to settle with Roku. They would much rather rent you a cable box. But for all of you that use Spectrum, I do hope that an agreement is reached soon.
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ChromeCast devices do NOT have native Spectrum TV app support.
(Spectrum is misleading about this on their platform support pages, until you drill down to how to use the Spectrum app on each platform, and it becomes clear they only support casting to ChromeCast devices).
They only support ChromeCast built-in receiving of GoogleCast/ChromeCast-based ("cast") streams from the Spectrum app of other devices (e.g. phones/tablets) - which any device with ChromeCast built-in support can do (e.g. TS4K, FireTV with third party app, Shield, O4KSB, or virtually any other Android-TV device).
So currently the only "streaming platform" devices with actual app support are Apple TV, XB, & Samsung TV (otherwise app support is available for mobile/tablet devices, which you can cast to ChromeCast built-in devices).
Considering Spectrum hasnt come to terms with Google for Android TV, LG for WebOS, Amazon for Fire TV or any other additional platforms to carry the Spectrum TV app in the several years since its been available, you are very unlikely to see it come to additional platforms before it ever comes to Roku again.
Do not buy a device assuming Spectrum might come that platform - only buy devices that are currently supported by the Spectrum TV app if you want to use the Spectrum TV app natively (not cast).
For more information about that channel's features and functionality, you'll want to contact Spectrum support directly to inquire further. Many channels on Roku are developed and maintained by the channel provider themselves.