Does This App Exist?

I wanted to create an open forum where anyone could ask for features they would want in an app and to see if these apps already exist. Google may not be the best option in these situations

I'm looking for an app that helps me absorb information a little better

Basically what I want is an app that allows me to create a list of websites, like The Verge and sends me a notification when the site posts an article with keywords that I add

Example

If I want to be alerted every time an article that had Katy Perry was posted on The Verge, it would send a notification to my iPad , and iPhone.

Anything out there like that?