Is there a good mathematical drawing app for drawing solid geometry?

GeoGebra is recommended. Not as famous as the domestic geometric sketchpad, but definitely not worse than the geometric sketchpad. Another advantage is that it is free. Recommend computer download. There is also a mobile app.

GeoGebra is a free and cross-platform dynamic mathematics software, which can be used by all educational levels, including geometry, algebra, tables, graphics, statistics and calculus, and is concentrated in a simple and easy-to-use software. Won many European and American educational software awards.

GeoGebra is a dynamic mathematics software which combines geometry, algebra and calculus. It was designed by Marcus Hornwater, a professor of mathematics at Atlanta University in Florida. On the one hand, GeoGebra is a dynamic geometry software.

You can draw points, vectors, line segments, lines, polygons, conic curves and even functions on them, and you can change their properties later.

On the other hand, you can also directly input equations and point coordinates. Therefore, GeoGebra also has the ability to handle variables (these variables can be a number, angle, vector or point coordinates), and it can also differentiate and integrate functions, find out the roots of equations or calculate the minimax of functions.

So GeoGebra has the function of dealing with algebra and geometry at the same time, so the left side of GeoGebra window is the algebra area, and the right side is the geometry area (also called drawing area), just like figure 1.

Geometric window

With the drawing tools provided in the toolbar, you can use the mouse to draw geometry in the geometry area. Select a drawing tool from the toolbar, and you can know how to use the selected tool with the help of tool use tips (behind the toolbar). Any object generated in the geometric region has an algebraic feature in the algebraic region.

Note: You can drag the objects in the geometric area with the mouse, and the algebraic features in the algebraic area will be dynamically updated at the same time.

Each icon in the toolbar represents a toolbox, and the toolbox contains some drawing tools with similar functions. You can use the left mouse button to press the small arrow in the lower right corner of the icon to open the toolbox.