Grapher is a small, lightweight, and free graphing calculator and function plotter designed for pupils and students. The app is available on Android 9.0 and developed by PROGOST-OLD under the Utilities & Tools category. With its simple interface, you can easily build any graph or function on a Cartesian coordinate system in just a few seconds. The app also allows you to draw simple, parametric, polar, or table types of math functions.

One of the most notable features of Grapher is its ability to build multiple functions at the same time on the same screen using different colors. The app also comes with a function list, color picker, and custom keyboard with all standard functions like cos, sin, tg, sqrt, ln, log, and more. Additionally, you can zoom and drag the graph with ease, double-tap to zoom, and view thumbnails for quick navigation.

Overall, Grapher is a useful tool for students and pupils who need to plot graphs or functions quickly and easily. The app's simple interface and multiple functions make it a great tool for anyone who needs to work with graphs or functions frequently.