Calctan is a calculator application for iOS devices (iPhone, iPad) that stands out for its minimalist and elegant design, as well as its additional features and functions that go beyond the capabilities of a traditional calculator. This app allows the user to choose from a wide range of colors and themes to customize the graphical interface of the calculator, which can enhance the user experience and make the app suit their personal style. In addition to color options, users can also be allowed to customize other display options, such as the size of the corner radius of the buttons and the separation border, which can make it easier for the user to find and use the button effectively. Calctan has the basic functions of addition, subtraction, multiplication and division, as well as advanced operations such as square root, power, logarithm and trigonometry to help users perform complex calculations in mathematics, physics, engineering and other related areas. In addition, it has a history feature that allows you to view previous operations. Some of the general features of Calctan are: 1. Intuitive Design: Calctan is easy to use thanks to its intuitive and minimalistic user interface that focuses on the essential elements of the calculator. 2. Advanced Mathematical Operations: Calctan can perform a wide range of advanced mathematical operations, including trigonometric functions, percentage calculation, exponents and more. 3. Calculation History: Calctan automatically saves the history of your calculations, allowing you to view and edit your previous calculations. 4. Interface customization: Calctan allows you to customize the interface with different color themes. 5. iCloud: This means that any calculations that are performed on one of the devices will automatically sync with the app on the other device. In addition, any customization that is made in one application will be reflected in the other, allowing for a consistent experience on both devices. 6. Split Screen Mode: iPad split-screen mode allows users to use calculator and other apps on the same screen. For example, users can use the calculator in one window and view a document in another window. 7. Swipe mode: Swipe mode allows users to open a second app at the bottom of the screen while using the calculator at the top of the screen. 8. Share calculations: The app can allow users to share calculation results with others via email, text messages, and other apps. OTHER FEATURES • 100 pre-installed themes • 47 built-in mathematical functions • Calculate with degrees or radians • List of basic constants • Option of random color themes • Custom color picker • Sounds and animations • Change the number of decimal places • Change the currency symbol • Change the thousands separator • Dark Mode • Settings menu • User manual In short, Calctan for iOS is a practical and efficient tool to perform mathematical calculations quickly and easily, with an elegant and modern interface, and multiple customization options to adapt to the specific needs of the user.