The new Tweetbot app for iPhone is now out and is a paid upgrade for iOS 7 due to a limited number of tokens set by Twitter. Tweetbot 3 is on sale for $2.99 at launch but will increase to $4.99 later on. Tweetbot is my most used Twitter app by far, so I would definitely recommend it especially if you don't own the older version. App info is currently processing and/or the app is not yet fully available for sale on the US App Store.
