Content of the app aside, nowadays it will flood your timeline with things you don't follow. About 20% of my timeline is tweets from people I follow - the rest is tweets from suggested topics, likes and follows from people I follow, etc. There's no way to turn this off, so you have to constantly wade through random tweets to see the people you actually follow. Not sure why this is happening now, but it's incredibly annoying and you can't turn it off at all.