A free app for Android, by Redail Software.

Learn SolidWorks 2D 3D Manual is a free, educational tool that teaches you how to use SolidWorks, a professional-grade, 3D modeling and assembly tool for designing mechanical parts, systems, and structures. It helps you to build a part in a simple way, no matter whether you are a beginner or an expert. 

This app has been developed by the Parasolid team, with the goal to provide an intuitive, easy-to-use tool that helps you design parts and structures quickly and efficiently. It has a user-friendly interface that lets you build parts in a simple and intuitive way. With this app, you can design and build parts using the most popular and widely used 3D modeling and assembly tool in the world, SolidWorks. It’s a free tool, so there are no costs associated with using it.