Click Here to Buy it Now from the Apple App Store,$3
Despite Twitter's best efforts to funnel all of its users to its website and apps, the best Twitter apps are still made by third-parties. If we were to spend money on a Twitter app, it would be Tweetbot. Navigating more than one timeline is easy, as is customizing it to suit your specific needs. If you're heavy on Twitter, Tweetbot is worth the $3.