Twitterrific goes free with version 5.7, optional IAPs to remove ads, enable push notifications
With the latest update, The Iconfactory has changed their business model for Twitterrific rather dramatically. Up to now, Twitterrific has been available for iPhone and iPad for $2.99.
However, Twitterrific has now changed to a freemium business model. This means anyone can download the app for free as an ad-supported application. There is also a selection of unlockable features available as in-app purchases.