Calx vs Calccis

CALX is an RPN calculator — a calculator designed to work with a list of numbers. This means that instead of just typing an equation into your calculator, you push numbers onto a stack, and then apply operations to the lowermost numbers in the stack. It's bizarre, but it makes sense once it clicks. If this all sounds confusing, don't worry! CALX comes with a guided tutorial which will get you up to speed in three minutes. Features: • Gestural interaction: Manipulate your data with simple, intuitive gestures. • Multiple keypads: CALX features an array of basic, scientific, and statistical functions. • Customization: Select from different fonts and colours to find a combination that works for you.

Calccis is a reverse polish notation (RPN) calculator. It supports basic arithmetic, trigonometrical, logarithm and exponent calculations for real, fractional, and complex numbers. Degrees and radians can be used for trigonometrical functions. You can perform matrix calculations, too. There is an undo stack, which supports undoing and redoing the 100 latest operations. Calccis does not copy or mimic any existing physical calculators. However, the operation of the stack has been influenced by how the stack works in the 1990s Hewlett-Packard HP-48 family of calculators.