Mari Shala is a free learning app for all students and teachers. It has various categories like English, Science, Math, Biology, Physics, and Chemistry. Lessons are categorized into different topics, such as Gujarati alphabets, fruits, vegetables, animals, colors, shapes, flowers, numbers, birds, months, weeks, days, transportation, directions, body parts, sports, festivals, countries, etc. This app is for students to help them improve their knowledge of those subjects, as well as for teachers and parents to help teach children effectively. 

The app is designed in a simple and user-friendly way so that it is easily used by both children and adults. It has a simple look and user interface, which allows users to navigate through the app conveniently and make quick changes in the settings. It also provides users with the necessary options to learn more about the different topics. 

In addition, the app contains various educational videos on specific topics. It has a rich collection of all the necessary books and papers the user can refer to. Furthermore, it provides the user with the option to share the content with their friends and family.