This app has hundreds of physics equations and only some solvers allow the calculation of the equation because it is a demo version. Summaries of different theories of physics are also presented. You must click on the icons to open the menus and swipe the screen with your finger to view more icons. There are help buttons that teach you how to use the app. The app's solver converts units, so it is easier to solve problems where there are different units. The app works in 3 languages: english, spanish and portuguese. To access all solvers you need to purchase the full version. Click the developer name on this page to see the full version.