Calculator is a versatile application that allows users to perform simple and complex math tasks. It offers a range of features, including history, real-time graphing, base conversion, and memory. Users can choose from a variety of colors to customize the app's appearance. The app can perform basic operations such as addition, subtraction, multiplication, and division, as well as scientific operations such as trigonometric, logarithmic, and exponential functions. Users can define their own functions and convert between binary, octal, decimal, and hexadecimal numeral systems. The app also supports complex numbers and real-time graphing.<br/><br/>To use advanced operators and functions, users can swipe to the left the colored bar on the right side or hold their device sideways. To call the graph panel, users can enter their expression with X. To see their history, users can swipe down from the display. To see the date of a past calculation, users can long click on the one they want. To remove a past calculation from the list, users can swipe it right or left. The app also offers a Help option in the settings for further instructions.<br/><br/>The source code for Calculator was forked from the AOSP platform package. This means that the app is built on an open-source platform and can be modified by developers. The app is available for Android devices and can be downloaded from the Google Play Store. With its range of features and customizable options, Calculator is a useful tool for anyone who needs to perform math calculations on their mobile device.<br/><br/>In conclusion, Calculator is a powerful and customizable math application that offers a range of features for users. It can perform simple and complex operations, convert between numeral systems, and support complex numbers and real-time graphing. The app is easy to use and offers helpful tips for users. The fact that the source code was forked from the AOSP platform package means that the app is built on an open-source platform and can be modified by developers. Overall, Calculator is a useful tool for anyone who needs to perform math calculations on their mobile device.