Mobile App Development

A curated list of useful resources for mobile app development (for Android, iOS, Windows, or any other mobile system).

Build your first app: Android’s guide to building your first app. A great place for beginners to start.
Kotlin Doc: Documentation kotlin from the source, playground, exercise and many information about Kotlin. Do you want to migrate from Java to Kotlin. Start here!
Android Basics in Kotlin: Android Basics in Kotlin is a course about building basic Android apps. This course is for people with no prior programming experience.
Advanced Android in Kotlin: This course provides a series of codelabs that lead you through the advanced topics of building Android apps using Kotlin.
Android Kotlin Fundamentals: In the course, you learn Android Kotlin programming concepts and build a variety of apps.
Material Design: Documentation for designing Layout in android.It helps to build high quality experience for Android.Do you want to make a beautiful UI? ,Start here!
Launch Mode: Instructions for Android OS which specifies how the activity should be launched.
Kotlin Coroutine: Best practice to simplify async code in android.
Google Codelabs (Android): Provides a guided, tutorial, hands-on coding experience about Android Development.

Apple Doc: Browse the latest developer documentation, including tutorials, sample code, articles, and API reference.
Swift Doc: Guide to the Swift Programming Language used for iOS development
Swift Tour: Walk through of basic data structures in Swift including Objects, Classes, Protocols, etc.
Swift Glossary: A one-stop dictionary of terms, providing definitions for all common terms used in the Swift language.
100 Days of Swift: A free collection of videos, tutorials, tests, and more, to learn and master Swift

Flutter: Flutter is Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase(flutter windows is now in alpha).
Dart: Dart is the programming language used in flutter.
Dart tutorials: These tutorials teach you how to use the Dart language, tools, and APIs to build applications.
How to do this in flutter: This site provide cheat sheets for flutter and dart.
Free flutter resources: Demo apps to get you started.
Bloc pattern: Flutter architectural pattern used to make the code scalable.This is a state management handling practice.
Factory method: Factory method design pattern is a good practice to instantiate the class based on the parameters.
React-Native: React Native combines the best parts of native development with React, a best-in-class JavaScript library for building user interfaces.
Expo: Uses React-Native for build one JavaScript/TypeScript project that runs natively on all your users’ devices.