Calculator is a free, feature-rich calculator app for Android developed by ShpeedTT. The app allows users to customize the calculator's look by picking up colors for text, buttons, and background styles according to their mood. The app provides big digits and buttons, making it easy to use.

Users can format digits as they type, so they can read the numbers easily, and there are up to five lines to display. The calculator supports operations with big numbers and has scientific functions, making it ideal for both personal and professional use.

The history function saves every operation, so users can select it later. There is also a percentage function that can be used directly in calculations. Other features include memory functions, instant results, and the ability to copy the result, change the order of function buttons, and set the decimals number for the result.

Overall, Calculator is a great choice for anyone who needs a reliable and customizable calculator app.