handyCalc VS MyScript Calculator

Calcbot for Apple Watch - Calculate, convert, and split tips from your wrist

SymCalc - Symbolic Calculator - Math toolbox for iOS. Advanced calculator features with a tape-like history, not requiring internet...

SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.

Soulver - Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.

Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.

Numi App - Numi is a beautiful text calculator for Mac.