I am thrilled to share with you that probably the best math app on the iPhone - Mathematician - just got a way better and is now available at great price of 0,99$ during this weekend only! The app offers a ton of great features for everyone who loves or hates mathematics! App Store link: App info is currently processing and/or the app is not yet fully available for sale on the US App Store. http://mathematican.info/ Cool YouTube video: