Scientific Calculator android

Universal free, every day use calculator with scientific features* Math expressions calculation (developed on RPN-algorithm but no RPN-calculators' kind UI!)* Percentages (calculation discount, tax, tip and other)* Radix mode (HEX/BIN/OCT)* Time calculation (two modes)* Trigonometric functions. Radians and degrees with DMS feature (Degree-Minute-Second)* Logarithmic and other functions* Calculation history and memory* Digit grouping* Cool color themes (skins)* Large buttons