Simple Calculator is a straightforward and intuitive calculator app designed for iPhone and iPad users. With its user-friendly interface, this app provides an easy and efficient way to perform basic calculations and more advanced functions.

The app features a 12-digit display, allowing users to input and view numbers with precision. It also includes tax calculation capabilities, making it a valuable tool for professionals and small business owners who need to calculate taxes on purchases or sales. Additionally, the app offers percentage calculations, allowing users to quickly determine percentages of numbers.

One of the standout features of Simple Calculator is its ability to perform cost, selling price, and gross margin calculations. This is particularly useful for individuals in business, as it allows them to easily determine costs, profit margins, and selling prices.

The app also includes memory operations, allowing users to store and recall numbers as needed. A grand total (GT) function is available for convenient summation of multiple numbers. Other features include square root calculations, sign change capabilities, arithmetic constant calculation, and digit grouping and decimal mark customization based on the device's locale.

Overall, Simple Calculator is a reliable and efficient calculator app that offers a range of essential features for both personal and professional use. Its intuitive interface and comprehensive functions make it a valuable tool for anyone in need of quick and accurate calculations on their iPhone or iPad.