Mobile devices are increasingly invading our lives. Pocket computers and smartphones have long lost the status of expensive toys and migrated to the category of necessary devices. This means that you need to create software for them. So why should you stay away? By reading this book, you will gain knowledge that will allow you to confidently create programs for pocket computers and smartphones. And a huge number of various examples will help you quickly improve and develop, enriching your work experience. The book is intended for beginner programmers.