Really Useful Calculator

When we were in school, teachers taught us how to do basic calculations without using a calculator, which helped us develop our mental and logic skills. However, as we advanced in our career, more complex operations were given to us.

Rudimentary set of features

A simple solution to the physical devices is their virtual versions, which come in handy when you have to make calculations for your homework. Really Useful Calculator is one of the many tools, which comes bundled lightweight to not complicate your work even more.
It's wrapped in an outdated yet intuitive layout neatly structured with the memory options on the left, the standard pads, in the middle, while on the right, you have the tax, and quick commands.

Use the keyboard to enter your figures

From the upper part you can select how many decimals the result should have, and at the bottom, the app displays a short explanation of what each button does. Compared with other similar tools, Really Useful Calculator enables you to use the Numpad keyboard to quickly type the numbers.

Calculate tax values and create customized functions

Besides the basic operations, such as addition, subtract, division, and multiplication, you are able to do square root, percentage, reciprocal, as well as tax estimations (net/gross, gross/net). The result can be copied to the clipboard and pasted into your school project or homework.
From the options, you can add new quick keys, and attribute them a formula, and a name. The option may be tested, by inputting a value in the bottom field. Those keys help you calculate specific operations with just one click. The tax percentage can be set from the Preferences menu.

To sum it up

Taking everything into account, Really Useful Calculator is a practical and accessible application designed to aid you in doing basic and tax calculations, using key combinations and custom functions.