This calculator can do everything! The program is stable and functional surface effect and can be made very attractive by selectable skins. The app calculates a variety units by pressing a button to: Km / m, Tg / sec. UWM this case, the computer is anpssbar even horizontal and vertical use can be configured differently. On top of that you also can reduce the extent and only when necessary can come to life again. I had the app already installed 2 years ago and then again away because it was a solved problem now with the need to be constantly online. This is necessary only for the start. I like the app even better on the tablet than on the phone. Conclusion: Today the app is free, but it is the price absolute value. Who does not want many operations, this app gets even cheaper with lower computational functions.