I would like to see examples of nocode apps with #4. I'd also like to know what language I should be using when searching and evaluating different tools. My challenge is that I go to all these sites: https://www.nocode.tech/category/app-builders and can't quickly understand how to approach #4 with any of these because they all seem to be for 1, 2, 3. nocode.tech nicely spells out their list for #3: " Customer... Source: about 1 year ago

There are services that can do that. https://www.pipes.digital/ is mine and filtering feeds is probably its main use case. There is also https://siftrss.com/ and I know that some RSS reader have similar functionality, like https://blog.feedly.com/leo-and-mute-filters/. - Source: Hacker News / over 2 years ago

Yes, you can learn more about filtering out / mute filters here https://blog.feedly.com/leo-and-mute-filters/. - Source: Hacker News / about 3 years ago