Features

Here is a list of some of the features:

Equations

The main goal of PEMDAS is let you work with equations. Simply type in an equation, hit enter, and you have the answer! There isn't any messing around like the one-step-at-a-time calculators, where half the work is just trying how to figure out how to enter the equation.

Variables

PEMDAS lets you assign variables by using the equals sign (you can access the iPhone/iPod Touch keyboard by tapping and holding the equation). Like the auto-cached answers, variables show up in the variable tab for easy one tap insertion into an equation.

Equations Cache

PEMDAS keeps track of everything you've calculated in the Equations tab of the app, even in between app launches. The Equations tab lets you see all the equations you've calculated and their associated answers, and lets you recalculate them with one tap. To clear all the equations, tap the Clear button.

Variable Cache

The answer cache makes it easy to see all your answers, and keep track of the variables you've used. The result of each calculation you do is assigned a unique variable name (ans1, ans2, ans3, etc.), and the previous answer is always stored in the 'ans' variable. To clear all the variables, tap the Clear button (which will also clear the equations).

Number Formatting

PEMDAS has several different kinds of number formatting, including float, scientific, engineering, and percent. It also lets you specify the number of decimals or significant figures to display, and lets you add thousands separators.