Calculator, developed by Juan Carlos Ferrer Lopez, is a free utility and tool app available on the Android platform. It offers a simple yet efficient way of performing basic and scientific calculations. The app allows users to add, divide, subtract, and multiply, along with other scientific calculations such as square roots, percentages, powers, and squared.

One of the main features of the Calculator app is that it maintains the operations on the screen even if you close the app. The horizontal scrolling feature allows users to view long operations conveniently. The app provides real-time results as users perform the calculations, making it more user-friendly. Users can access the history of operations from the history button. The pop-up menu, available by pressing the menu button, allows users to save their operations to memory, copy or paste results on the display. The app also offers a counter in one of the parentheses to keep track of its use. Users can delete the entire or part of the operation by pressing and holding the backspace button. The app also offers a night mode theme for users to change the theme.

Overall, the Calculator app is a reliable and efficient tool for basic and scientific calculations, with a user-friendly interface and useful features that make it stand out from other calculator apps on the market.