PRICES MAY VARY. This book provides a detailed step-by-step explanation on how an android mobile application named "Digital Note" was developed with Kotlin programming language in Android Studio 4.2 from the beginning to the end. It features View Binding, Room Database, LiveData, ViewModel, RecyclerView, Kotlin Coroutines, Bottom Navigation Bar, Settings Preferences, App Localization, Version Control with Git, App icon, among others. This book is a very good resource for software developers who would like to see how some of the Android development concepts they have learned could be practically applied. It is made up of thirty-one (31) stages and the compilation of all the lines of code that make up the application. Happy learning and coding.