公式计算器 - 万能计算器 is a free utility and tools app available on the iPhone platform. It offers a wide range of built-in calculation formulas, allowing users to input parameters and complete engineering calculations. The app also allows for the customization of formulas, catering to individual needs and improving efficiency.

In addition to its formula capabilities, the app includes various simple geometric models. Users can input different known data to calculate unknown variables. This feature is particularly useful for solving geometry-related problems.

Furthermore, 公式计算器 - 万能计算器 provides a comprehensive scientific calculator, meeting various calculation needs. Whether it's basic arithmetic or complex scientific calculations, this app has got you covered.

Overall, 公式计算器 - 万能计算器 is a versatile and convenient tool for users who require a reliable calculator with a wide range of functions.