Best dongle/box for catch up TV and you tube

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I am looking for a dongle/box to make a non smart TV into a smart TV please

I don't want to pay for subscription (after inclusive offer - if applicable)

I just would like to watch freeview on catch up and you tube

So don't need Amazon or sky (but if they are included in 3 month offer then ok)

I like remotes rather than voice control cos don't want it listening to everything that is said (like ALEXA)

Don't want to spend more that £30 the cheaper the better TBH

Thank you

Well Roku seems best, doesn’t it?

I use a chromecast and stream mobile phone apps.

Amazon fire stick