Looking for RSS reader app with SEARCH feature

I'm looking for an RSS feed reader that is smart enough to find the feed URL automatically, for example I type a website like "xda-developer.com" or better, just "xda" and the app has a search engine that finds the URL
The app should not force me to register, and should not have abusive permissions.
I don't like predefined feeds, I prefer to choose my own sources, but if I can remove them it's OK.
Open source would be great. Paid app would be OK if nice looking.
Do you know such an app, or should I develop it myself?

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