Calculate: Advanced Calculator 4+

Enter equations as they're written. Easy, intuitive history. Symbolic display. All the functions you could possibly want. Clicky/clacky sounds. Yes.

Calculate is a fully-featured scientific calculator packed with innovative features and carefully designed interface.

With Calculate, calculations can be entered in the order that they would be written on paper. The symbolic feature reduces complicated numbers to simple fractions, integer square roots, and more. Previous calculations can be accessed using a familiar swipe gesture. There's more, trust me: it's preeeetty good.

FEATURES

⋇ Fully-featured scientific calculator
⋇ Simple, elegant user interface
⋇ Full complement of mathematical functions: trigonometry, logarithms, powers, parentheses etc.
⋇ Symbolic mode displays numbers with simple fractional representations as such e.g. ⅝ √2 2π
⋇ Calculation history accessed using a swipe downwards gesture on the display
⋇ Informative error system makes it easy to correct typos
Four different number display modes: normal, scientific form, fixed decimal places, and engineer mode (using a SI prefix such as k for 1000)
⋇ Degree or radian modes
⋇ Your choice of Clicky or Clacky sounds! Sampled from a real calculator!

It's great for scientists, engineers, mathematicians and students.