It works on both the iPhone and iPad, with an optional Apple Watch app to boot. The app is aimed at "scientists, engineers, students, programmers, or indeed anybody looking for a feature-rich calculator." If the reviews are anything to go by, this is the gold standard for calculators on the App Store.
Archimedes Calculator brings a graphing calculator experience to the iPhone and iPad. The calculator app automatically calculates the answer in both numeric and exact forms. Switch between both options by simply swiping horizontally.
The Expressions scientific Calculator app for iPhone is a multifunction scientific calculator offering a wide range of features specific for anyone looking from basic to advanced calculations. This iPhone app for calculating scientific equations is an ideal tool optimized for high-school and STEM university students, chemists, engineers, mathematicians and physicists. The app helps you solve problems by providing you a rich sample of natural constants, a large database of commonly used formulae in mathematics, physics and chemistry.
PCALC Lite is a powerful option for engineers, scientists, programmers, students, or anyone else looking for a calculator rich with features. You get multi-line display, your choice of button layouts, a paper tape, and support for hexadecimal, binary, and octal calculations. The Lite version is fully functional and offers two different themes. It even has an Apple Watch app so you can perform calculations on your wrist. If you try out this version and like it, the full version has more themes and settings and other features that you can buy individually from inside PCalc Lite. PCalc Lite app review 2b1af7f3a8