So on Amazon prime, I have to pay for a prime subscription and then the app price is that the same thing on Roku do I have to pay a subscription price and then an app price?
If you subscribe to Prime through Amazon, then just log into the Prime app on a Roku using your Prime email and password (or web link and passcode.)
This is true with most all services on a Roku. You are better off paying DIRECTLY and not through Roku.
I’m not sure if this is exactly what you mean, but Amazon Prime is mostly about the free shipping, and you get some video and audio too. So there is a fee for Prime even if you never watch anything. On the other hand, there is no inherent fee for Roku. (Of course, having a Roku doesn’t cause free shipping – Roku and Amazon Prime are just not exactly equivalent things.) I had Prime for years. When I got a Roku, I just connected it to my existing Prime account.
Of course, Roku having no inherent fees doesn’t mean there aren’t fees for HBO, Disney and other premium/commercial-free TV providers. But there are many other things on Roku, and especially if you can tolerate many commercials, then it is fully possible to watch Roku with no monthly fees at all.
You can also sign up with Amazon Prime Video, without other Prime benefits, for $8.99/month on Amazon.com.
I would sign up directly with Amazon, rather than through a third party like Roku, to assure that I can view it on platforms other than that third party's system.