Flutter is an incredible toolkit that lets you build iOS and Android apps from a single codebase. The official documentation does a great job covering a lot of the basics. These basics can get you pretty far, even let you create apps ready for publishing on the app stores. But to take your apps to the next level, it helps to see lots of real-world examples.In this book, you'll learn how to build professional iOS and Android apps for the real world. You'll gain all the foundations of mobile development you need to make the best decisions in your own codebase while addressing critical problems such as state management, user authentication and dynamic theming.This book is for Flutter developers looking to go from "I know Flutter" to "I can confidently create professional Flutter apps".Topics Covered in this bookRepository Pattern: Get your data layer under control with the repository pattern, how to properly handle exceptions, write clean mappers, support caching, different fetch policies etcManaging State With Cubits & the Bloc Library: Understand what state management is all about and why Blocs and Cubits are the best tools for the job.Validating Forms With Cubits: Master Cubits before moving on to actual Blocs in the next chapter. Learn how to combine the bloc library with Formz to achieve first-class form validation in Flutter.Authenticating Users: Learn what user authentication is, how it works and how to best architect your application to support it.Internationalizing & Localizing: Learn how to make your app accessible to other languages.Creating Your Own Widget Catalog: Learn about the need for a component library and storybook. Add platform-specific files to a package, make it runnable as a standalone app and use it to showcase widgets in that package.Supporting the Development Lifecycle With Firebase: Learn about monitoring app lifecycle with the help of Firebase Analytics and Firebase Crashlytics.Running Live Experiments With A/B Testing: Learn to test differ