Learn Java - A Step by Step Guide is an Android application developed by Eng. Ali Gamal and created by Saad Aldobai, a talented programmer and professor. The app is designed to teach Java from the basics to advanced programming, with each lesson accompanied by explained codes to help users understand the concepts better.

The app has a beautiful design that is easy to navigate. At the end of each lesson, there is a video that summarizes the topic and explains it further. There is also a search bar that allows users to find the lesson they are looking for easily. Additionally, the app has a feature that allows users to enlarge the font size to make it easier to read on different phone screens. This app is an excellent resource for anyone looking to learn Java programming.