计算器-科学计算机 is a free utility and tools app available for iPhone. It combines various calculators and converters into one convenient tool. With this app, users can access a standard calculator for basic operations such as addition, subtraction, multiplication, and division. The app also offers a scientific calculator with functions like logarithms, exponentials, trigonometry, and more.

In addition to the calculators, there are other useful features included in the app. Users can calculate fractions, convert currencies, calculate personal income tax, calculate mortgage and car loan payments, work with dates, and convert between different number systems. The app also allows users to create custom formulas and perform unit conversions.

计算器-科学计算机 provides a simple and convenient way to perform various calculations and conversions. It offers features like history recording, voice reporting of results, uppercase conversion of numbers, and easy copying of results. The app also includes multiple themes for customization.

Please note that the app offers an auto-renewable membership with different subscription periods and prices. Users can cancel the subscription through their iTunes account settings.

Overall, 计算器-科学计算机 is a comprehensive calculator app with a wide range of features that cater to various calculation and conversion needs.