RealCalc 1.4.3
Download Link: http://www.freewarelovers.com/android/app/realcalc
Screen size: Full
Rating: 10
Description: This is an awesome HP-style calculator that supports normal and RPN modes. It handles dec/hex/bin/oct conversions, all the trig functions, roots and powers, logs, even combinatorials and permutations and unit conversions. Has memory/history registers. The only thing it doesn't do is graphing.