Easy Calculator with a nice Design, fast but very simple. Keys like on the PC Keyboard! Memory and Undo function!- Vibration can be changed - Undo Function for 100 operations!- Diffrent Styles! - Keys and Handling same as on a PC or Mac- Memory function, sin, cos, PI, log usw.- Back- and Undo FunctionDownload: "Deluxe Calc PRO" without Banners and more Styles!