RealCalc Scientific Calculator. Android's number 1 Scientific Calculator. A fully featured scientific calculator which looks and operates like the real thing.Looking for fractions, Degrees/minutes/seconds, Landscape mode, You need RealCalc Plus. See elsewhere on this page for the link, or choose 'Upgrade' from the RealCalc menu. RealCalc includes the following features: Traditional algebraic or RPN operation. Result history. Unit conversions. Physical constants table. Percentages. 10 memories.