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.
Take caps lock off. All caps is commonly understood to indicate shouting. That's been online etiquette for quite some time. So, try that.
Now, the thing about the various apps available is that some are designed to work in conjunction with a cable or satellite service. Some are not. It appears as if the apps you've tried are those type.
The other thing you should realize is that there are ways of watching just about anything without cable. I dropped cable in early 2011 and can watch a lot of stuff. I know it's possible, but the only thing is that it depends on what it is you're wanting to watch.
So, what channels are you trying to watch? You may be able to watch on-demand (kind of like DVR content) or even live (but that costs more). So, what is it you're after?
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The direct answer to your question is that to use a Roku an internet connection is required. If you have an internet-only connection with no tv content there are cable-type channels you won't be able to receive on Roku without making some other arrangements.
Cable-type channels want to be paid. When you have a paid subscription to a provider service that carries these channels, they receive their pay out of the subscription fees you pay that provider. When you don't have a subscription to such a provider you are not paying for those channels.
Many cable-type channels only make their programming available for streaming on devices like Rokus to those paying for them through a provider as mentioned above. That service doesn't have to be a bloated cable or satellite service however. There are several you can subscribe to and run on a Roku that may carry the channels you are interested in. Ones that come to mind to check out for any particular channel would include YouTube TV (currently in contract dispute with Roku), Hulu plus Live TV, Sling, and AT&T NOW -- there may be others.
Savings in cord cutting usually come from picking and choosing which of the offerings you wish to pay for instead of paying for full blown cable or satellite services with scores of channels you never watch.
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Roku Streaming Stick, 3600X, Ser 5S56D8240827, wifi - JVC EM37T