To download the Spectrum App on your TV, you'll need to make sure your device is compatible - think Smart TVs, Streaming Devices, or Gaming Consoles. Check your TV's app store, and search for the Spectrum App - it's usually pretty easy to find!
Once you've found the app, click "Download" or "Install", and wait for it to load - this should only take a few minutes, depending on your internet connection. When it's done, you'll be prompted to sign in with your Spectrum account - if you don't have one, you can create it on the spot!