A free program for Android, by Zdiv.

R is a programming language for building the most robust and efficient applications in the world. With over 4.3 million downloads worldwide, R is the most popular language for data analysis, graphics, and visualization.

R provides a wide variety of tools for building robust and efficient applications, including a variety of graphical tools such as plots, charts, and data tables. It also provides a variety of statistical tools, such as linear regression, nonlinear regression, and other statistical methods.

In addition, R provides a variety of ways to build, test, and deploy your application, including a graphical interface for creating graphs, a variety of testing tools such as visual regression testing, and a build and deploy system.

R is an open source programming language and its source code is available on GitHub for anyone to view, modify, and contribute to.