30 resources · 30 free
Mobile Development
Create iOS and Android apps — native, cross-platform, and mobile-first skills.
Build a Mobile App with Google Sheets on Glide and No Coding (Coursera GP)
Coursera Guided Project (Angelo Paolillo): create a mobile app from a Google Sheet using Glide — data structure, app layout, pages, sharing, distribution and testing, zero coding. ~2 hours, desktop only, shareable certificate.
Android Developers Documentation
Google's official documentation for Android app development, covering Kotlin, Jetpack Compose, app architecture, and platform APIs. You learn modern Android development practices through guides, API references, and best-practice articles. Suitable for beginners through advanced developers building for phones, tablets, and Wear OS. The authoritative source maintained directly by Google's Android team.
Android Basics in Kotlin (Google)
Google's official beginner course that teaches Android development with Kotlin, from your first app to working with data and the Android framework. You complete hands-on codelabs with quizzes and build real apps along the way. Designed for people new to Android programming who want a structured, free path. Produced by the Android developer relations team and used by learners worldwide.
Android Studio
The official integrated development environment for Android development, built on IntelliJ IDEA. You use it to write, debug, profile, and test Android apps with emulators, layout editors, and code analysis tools. Required tooling for every Android developer, from beginners to professionals. Free and open source, maintained by Google and JetBrains.
Google Codelabs
Google's library of guided, hands-on tutorials where you learn by coding in a browser or your IDE. You follow step-by-step labs covering Android, Flutter, Firebase, machine learning, and more, each with complete starter code. Great for developers who learn best by doing and want short, focused sessions. Hundreds of labs authored and maintained by Google engineers.
Kotlin Documentation
Official language documentation for Kotlin, the primary language for Android development, including coroutines, collections, and multiplatform topics. You learn the language from basics to advanced idioms through tutorials, guides, and API references. Essential for Android developers and anyone using Kotlin on JVM, native, or web targets. Maintained by JetBrains, the creators of Kotlin.
Kotlin Koans
A series of short programming exercises that teach Kotlin syntax and idioms by having you fix or complete small code tasks. You work through collections, functions, classes, and functional constructs with instant feedback. Ideal for new Kotlin learners who want hands-on practice alongside the docs. Created by JetBrains as the official interactive introduction to the language.
Kotlin Playground
An in-browser environment for writing and running Kotlin code instantly without installing anything. You experiment with snippets, run full examples, and share code via links. Perfect for trying language features, preparing interview exercises, or testing small ideas on any device. Run by JetBrains as the official online Kotlin REPL.
Flutter Documentation
Official documentation for Flutter, Google's UI toolkit for building cross-platform apps from a single codebase. You learn widgets, state management, navigation, and platform integration through guides, API references, and samples. Suitable for beginners and experienced mobile developers targeting iOS, Android, web, and desktop. Maintained by the Flutter team at Google and continuously updated.
Flutter Codelabs
Curated, hands-on tutorials that teach Flutter by building working apps step by step, from your first app to advanced layouts and animations. You code along with starter projects and clear explanations at every stage. Perfect for beginners who want guided practice with real outcomes. Authored by the official Flutter team at Google.
Flutter YouTube Channel
Google's official Flutter YouTube channel with release videos, widget of the week episodes, conference talks, and deep-dive tutorials. You learn new features, best practices, and real-world techniques from Flutter engineers. Great for visual learners and developers keeping up with the framework. Backed by the official Flutter team with hundreds of thousands of subscribers.
Dart Documentation
Official documentation for Dart, the programming language behind Flutter, including language tours, core library guides, and tooling references. You learn syntax, async programming, and how to write clean Dart for mobile, web, and server. Essential companion for every Flutter developer. Maintained by the Dart team at Google.
DartPad
An online editor for writing and running Dart code in the browser, with support for Flutter widget previews and embedded gists. You experiment with language features and small Flutter demos without any setup. Ideal for trying ideas quickly or following tutorials on any machine. Provided and maintained by the official Dart team at Google.
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Awesome Flutter
A curated open-source list of the best Flutter libraries, tools, tutorials, and articles, organized by category. You browse thousands of resources including UI components, state management packages, and full open-source apps to study. Invaluable for Flutter developers looking for packages or learning from real projects. One of the most-starred awesome lists on GitHub, actively maintained by the community.
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Swift.org
The official home of the Swift programming language, with language guides, API design guidelines, and getting-started resources. You learn Swift syntax, concurrency, and cross-platform development for Apple platforms and beyond. The starting point for anyone building iOS or macOS apps. Maintained by the open-source Swift community led by Apple.
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Swift Playgrounds
Apple's free iPad and Mac app that teaches Swift and SwiftUI through interactive puzzles and guided lessons. You learn programming concepts by solving challenges with real code in a playful environment. Perfect for absolute beginners, students, and educators who want a gamified introduction to iOS development. Developed and distributed by Apple, available free on the App Store.
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Apple Developer Documentation
Apple's official documentation for iOS, iPadOS, and macOS development, covering SwiftUI, UIKit, and all system frameworks. You learn APIs, design patterns, and platform capabilities through references, articles, and sample code. The authoritative resource for every Apple platform developer. Maintained by Apple, continuously updated with each OS release.
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SwiftUI Tutorials (Apple)
Apple's official step-by-step tutorials that teach SwiftUI by building a complete app with navigation, data, and animations. You follow interactive chapters with Xcode previews and sample code. Ideal for developers new to modern iOS interface development. Published by Apple as the canonical introduction to SwiftUI.
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100 Days of SwiftUI (Hacking with Swift)
A structured 100-day course that takes you from Swift basics to building complete SwiftUI apps with daily lessons, challenges, and quizzes. You learn by writing code every day and consolidating skills with hands-on projects. Built for serious self-learners who want a daily routine to master iOS development. Created by Paul Hudson, one of the most respected iOS educators, and completely free.
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React Native Documentation
Official documentation for React Native, the framework for building native iOS and Android apps with JavaScript and React. You learn core components, navigation, native modules, and performance best practices. Essential for web developers moving into mobile or teams building cross-platform apps. Maintained by Meta and the open-source React Native community.
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Expo Documentation
Official documentation for Expo, the framework and platform that makes React Native development dramatically easier with managed builds, dev tools, and over-the-air updates. You learn to scaffold, build, and ship apps to both app stores from a single codebase. Perfect for React Native beginners and teams that want faster release cycles. Maintained by Expo, the leading React Native tooling company.
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Awesome React Native
A curated open-source list of React Native resources: components, libraries, tools, tutorials, and open-source apps. You discover community-vetted packages and study full production apps to learn architecture patterns. Great for React Native developers at any level hunting for the right library or inspiration. One of the most-starred awesome lists on GitHub, maintained for many years.
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React Native Express
A free, open-source ebook that teaches React Native from first principles: JavaScript refreshers, React concepts, styling, and mobile-specific APIs. You read clear explanations with runnable examples covering the whole framework. Ideal for web developers transitioning to mobile development. Written by developers and freely available online, with the source on GitHub.
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CS50's Mobile App Development with React Native
Harvard University's free course on mobile app development using JavaScript and React Native, from the makers of CS50. You learn modern JavaScript, React, state management, and native mobile APIs through lectures and projects. Designed for learners with some programming background who want rigorous, university-level instruction. Taught by Harvard professors and freely available with all materials online.
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Exercism Kotlin Track
A free platform offering hundreds of Kotlin coding exercises with automated feedback and optional human mentorship. You solve progressively harder problems, get your code reviewed, and build real fluency in Kotlin. Perfect for Android developers who want deliberate practice and constructive critique. Non-profit organization with an open-source exercise repository and a worldwide mentoring community.
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Android Developers YouTube Channel
Google's official Android developers channel featuring conference talks, Now in Android updates, and deep technical tutorials on Kotlin and Jetpack Compose. You learn platform changes, best practices, and architecture guidance directly from Google engineers. Ideal for developers who prefer video learning and staying current with Android. The authoritative video source from Google's Android team.
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iOS Dev Weekly
A free weekly newsletter curating the best articles, tools, and news about iOS and Swift development from around the web. You get a hand-picked digest of tutorials, opinion pieces, and new libraries every Friday. Perfect for iOS developers who want to stay informed without endless scrolling. Run continuously since 2013 by developer Dave Verwer, with tens of thousands of subscribers.
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r/FlutterDev Community
The largest Reddit community for Flutter developers, with hundreds of thousands of members discussing widgets, state management, bugs, and release news. You ask questions, share projects, and learn from real-world experiences of other developers. Valuable for troubleshooting and staying connected with the Flutter ecosystem. Free, open, and actively moderated by the Flutter community.
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Android Developers Training Courses
Google's official Android training hub offering free structured courses and codelabs covering Kotlin fundamentals, Jetpack Compose UI, and modern app architecture. Learners follow video lessons and hands-on codelabs with sample projects to build and ship real Android apps. Suited to beginners through intermediate developers preparing for the Associate Android Developer certification; fully self-paced and free.
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Apple Develop in Swift Tutorials
Apple's official free tutorial series that teaches Swift programming and SwiftUI app building for iOS, iPadOS, and macOS. Learners work through guided Xcode-based lessons, progressively building complete apps and earning certificates for finished units. Aimed at complete beginners with no coding experience as well as existing developers moving to Apple platforms; self-paced and free.
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