You can do fractions on your iPhone calculator using two different methods. When you turn your iPhone calculator sideways — switching it to a scientific-calculator layout — you'll be able to use more ...

Google Calculator is an online tool offered by Google that lets you use its website to do basic math calculations such as addition and subtraction. This is convenient if you are on a business trip or ...

On Android, consider checking out Graph 89 Free —though you’ll need a .ROM image for it to work (something you can extract from your existing graphing calculator or surely find elsewhere).