X-rpCalc

X-rpCalc is a straightforward and plain calculator that comes in handy for those who don't need a complex tool to make basic and trigonometric operations with ease. It features a history and memory lists.

As the app is portable and comes with the necessary items in an archive, it means it can be carried on a USB flash drive and run from any location that has a working computer. Since it's not tied to the Windows system, it doesn't create new entries in the registry nor occupies much space on the disk.

The provided interface is old and simple with the functions on the upper part of the window, while the numeric pad is located at the bottom. You can access the memory list by right-clicking on the panel. You have the option to enter the number by either using the Numpad keyboard or manually clicking on the buttons.

You can make basic operations such as addition, subtract, multiplication, and division. You can calculate trigonometric functions, like sine, cosine, tangent, and cotangent. Also included into the panel are inverse, natural logarithm, exponential, and financial equations.

In the history tab, you can view all the recently made operations, and copy them to the clipboard to be further used in school or team projects. The memory lets you store up to nine values, after that, they are going to be replaced with new ones.

It would've been a good addition if a help file was included to properly explain the displayed functions, as not many know the abbreviation for each item. Plus, no short descriptions are shown when hovering the mouse over the operators.

The bottom line is that X-rpCalc is an average and simple program designed to offer easy ways to calculate simple operations and more complex functions. Despite the given options, the program hasn't been updated for some time and might need some improvements regarding the interface and the provided features.