Xmart Calculator Mini is a versatile calculator app for iPhone that offers much more than just basic arithmetic functions. Developed by XH Liu, this free app falls under the category of Business & Productivity. With Xmart Calculator Mini, users can perform complex calculations and even define their own algebraic functions.

The app's main feature is the ability to create custom functions. Users can define any algebraic function with up to 9 parameters and use it in their calculations. For example, users can define a function to calculate annual income based on a given day rate and the number of working days in a year. This eliminates the need to enter the same buttons repeatedly, saving time and effort.

In addition to custom functions, Xmart Calculator Mini supports most scientific math functions and provides step-by-step traceability for all calculations. Users can save and recall history items, name them meaningfully, and even share them with friends. The app also offers various customization options, such as configuring colors and fonts.

Xmart Calculator Mini is not just a calculator, it is a powerful tool for anyone who needs to perform complex calculations or create custom functions. With its intuitive interface and extensive features, this app is a must-have for iPhone users seeking a versatile calculator app.