The Simple Calculator - Solve is a free and easy-to-use calculator app for iPhone. It offers a range of features that make it a useful tool for everyday calculations.

With The Simple Calculator - Solve, you can switch between portrait and landscape modes, allowing you to use the app in whichever orientation is most convenient for you. Additionally, the app offers a dark mode, which is ideal for use in low-light environments.

One of the standout features of The Simple Calculator - Solve is its split view functionality. This allows you to use the calculator alongside other apps, making multitasking a breeze.

The app also supports basic mathematical operations, such as addition, subtraction, division, and multiplication. It goes beyond the basics with features like power of two, power of three, square root, cubic root, percentages, and inverse functions.

In addition to its mathematical capabilities, The Simple Calculator - Solve also includes geometrical applications for everyday shapes. You can calculate the perimeter, area, diagonal, volume, and surface area of squares, circles, spheres, and triangles.

Overall, The Simple Calculator - Solve is a versatile and user-friendly calculator app that covers a wide range of mathematical and geometrical functions. Whether you need to perform simple calculations or more complex mathematical operations, this app has you covered.