Lucky Calculator combines the normal and scientific calculator. Use simple and fast basic calculator for everyday tasks, switch to Scientific calculator for you solve a bit difficult mathematical problems. Take advantage of Scientific calculator loaded with more than 30 functions including root, power, or geometric calculations. It has a note for calculation history. -It features basic calculation buttons in portrait view, advanced mathematical/scientific buttons in landscape view, memory buttons will also behave just like the original calculator, history, storing results in an easy-to-use way, copy to clipboard and paste to document, works both in portrait and landscape device orientations, button sound is mutable, support copy and paste, and support external keyboard.