An awesome, super fast easy-to-use full-fledged calculator, especially designed for Android.
Swipe the display and switch seamlessly between 4 different scientific skins and one basic skin.
Choose the way you want to input arithmetic expressions. With input method "infix" you can type "sin 45". You would type "45 sin" if you prefer the old-style input method.
Droid Calc comes with decimal (12.3), sexagesimal (33° 20' 10"), exponential (2.3e-22) and fractional displays (2 3/4). It performs arithmetic, trigonometric and logarithmic functions. It knows about permutations, combinations, fractions, percentage calculation and co-ordinate conversions. And you have 7 memory cells to store your results.