Ultimate Compose Multiplatform: Android/iOS + Testing from Udemy

Stop building the same app twice. Unlock the power of code sharing and become a highly sought-after mobile developer by mastering Compose Multiplatform. This course is your definitive guide to building beautiful, native-performing apps for both Android and iOS from a single Kotlin codebase.

If you're a Kotlin developer ready to level up, this course is designed for you. Forget abstract examples. We'll build "CoinRoutine," a feature-rich and practical Virtual Crypto Wallet app, from scratch. You won't just learn the "what"—you'll understand the "why" behind every decision, from architecture to UI polish.

By the end of this course, you will have the skills and the portfolio piece to prove you are an industry-ready Compose Multiplatform developer.

What You Will Build: The "CoinRoutine" Crypto Wallet App

This isn't just another to-do list app. You'll build a complete, real-world application with features that mirror what you'd see in a professional development environment.

Live Crypto Data from the Web: Connect to a real-time API using Ktor3 to fetch and display dynamic data for the top 100 cryptocurrencies. You'll master handling network requests and parsing JSON like a pro.
Canvas and Charts: Go beyond basic UI. Use Compose Canvas to create a simple price chart that visualizes crypto price movements and fully supports Light & Dark themes.
Persistent Portfolio Management: Allow users to manage their crypto portfolio with a local database that persists data. You'll implement the latest Room 2.7 annotations to create a database schema that is shared seamlessly between Android and iOS.
Clean, User-Friendly Input: Implement a simulated "Buy & Sell" feature with custom TextFields, input validation, and visual transformations to create an intuitive user experience.
Modern & Safe Navigation: Structure your app's flow using Compose Navigation. We'll implement type-safe navigation to prevent runtime crashes and ensure a smooth, predictable user journey.
Robust Error Handling: Every great app needs to handle errors gracefully. You'll build a flexible error-handling system for both network and database operations, displaying clear messages from shared Compose resources.

Technologies & Architectures You'll Master

This course dives deep into the professional-grade tools and architectures that companies demand.

Architecture: MVVM (Model-View-ViewModel) and Clean Architecture to build scalable, maintainable, and testable applications.
Dependency Injection: Koin 4 for managing dependencies cleanly across shared and platform-specific modules.
Networking: Ktor 3 for modern, asynchronous API calls.
Database: Room 2.7 for powerful, local persistence shared across platforms.
Image Loading: Coil 3 for efficient and easy image loading.
UI: Material 3 for a modern, beautiful user interface, including support for Edge-to-Edge display.
Platform-Specific Power: Implement Biometric Authentication (Face ID & Fingerprint), manage permissions, and use custom fonts and platform-specific icons to give your app a truly native feel.

Go Above and Beyond with Advanced Sections

We don't stop at the basics. Two extra modules will push your skills to the professional level:

Extra 1: Bulletproof Your Code with Testing
- Write Unit Tests for your ViewModel logic to ensure your business rules are correct.
- Master Compose UI Testing to verify that your screens look and behave exactly as you expect.
Extra 2: Advanced Platform Integration
- Implement secure Biometric Authentication (Face ID & Fingerprint) for both Android & iOS using platform-specific APIs.
- Refine your app with custom animations and advanced permission handling for a polished, App Store-ready user experience.

Why This Course Is Different

Project-Based from Start to Finish: You learn by doing. Every concept is applied directly to our CoinRoutine app, ensuring you gain practical, usable skills.
No Perfect Scenarios, Just Real Code: I show you the real development process—including how to debug issues and fix bugs as they appear. This is how real-world development works.
Bleeding-Edge & Future-Proof: You'll be using the latest stable and experimental versions of key libraries (as of 2025), to ensure your skills are relevant today and tomorrow.

Ready to Become a Compose Multiplatform Expert?

Enroll now and start building your future as a Compose Multiplatform expert.

What's inside

Learning objectives

Pure kotlin, cross-platform mastery: build real apps with kotlin 2 & compose multiplatform, sharing ui and logic for android & ios
Virtual crypto wallet with api: create a client-side crypto wallet that simulates portfolio/buy/sell logic and fetches live coin data via apis using ktor 3
Dynamic ui & navigation compose: make cool uis with custom textfields, animations, dark/light modes in material3 & safe args navigation

Advanced api & data management: utilize ktor 3 for api calls, coil 3 for image loading & room 2.7.0 for local data storage on both android and ios
Clean architecture & dependency injection: design scalable apps with clean architecture and manage dependencies using koin 4
Robust testing & error handling: master unit/ui testing with kotlin test, turbine & assertk, ensuring solid error handling

Pure kotlin, cross-platform mastery: build real apps with kotlin 2 & compose multiplatform, sharing ui and logic for android & ios
Virtual crypto wallet with api: create a client-side crypto wallet that simulates portfolio/buy/sell logic and fetches live coin data via apis using ktor 3
Dynamic ui & navigation compose: make cool uis with custom textfields, animations, dark/light modes in material3 & safe args navigation
Advanced api & data management: utilize ktor 3 for api calls, coil 3 for image loading & room 2.7.0 for local data storage on both android and ios
Clean architecture & dependency injection: design scalable apps with clean architecture and manage dependencies using koin 4
Robust testing & error handling: master unit/ui testing with kotlin test, turbine & assertk, ensuring solid error handling

Syllabus

Introduction

What we build

Setup Environment - Part1

Setup Environment - Part2

Career center

Learners who complete Ultimate Compose Multiplatform: Android/iOS + Testing will develop knowledge and skills that may be useful to these careers:

Cross-Platform Mobile Developer

A Cross Platform Mobile Developer specializes in building applications that run across multiple operating systems, such as Android and iOS, using a single codebase. This course is specifically designed to transform you into a highly sought-after Cross Platform Mobile Developer by mastering Compose Multiplatform. You will learn to share UI and logic using Kotlin 2, building a complete virtual crypto wallet app from scratch. The curriculum covers everything from connecting to real-time APIs with Ktor 3 and managing local databases with Room 2.7, to implementing modern UIs with Material 3 and ensuring app reliability through comprehensive unit and UI testing. This training provides the practical expertise and portfolio piece needed to excel in this specialized field.

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Mobile Application Developer

A Mobile Application Developer creates software for smartphones, tablets, and other mobile devices. This course is a definitive guide to becoming an industry-ready Mobile Application Developer, mastering the art of building beautiful, native-performing apps for both Android and iOS from a single Kotlin codebase. You will gain practical, usable skills by building a feature-rich virtual crypto wallet, integrating live API data, custom UIs, persistent data management with Room 2.7, and robust error handling. The course's focus on MVVM and Clean Architecture ensures you develop scalable and maintainable applications, while testing modules provide the foundation for bulletproof code. This comprehensive training prepares you to tackle real-world development challenges.

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Android Application Developer

An Android Application Developer designs and builds applications specifically for the Android operating system. While this course focuses on multiplatform development, its deep dive into Kotlin 2 and Compose Multiplatform provides an exceptional foundation for an Android Application Developer. You will master critical Android-centric technologies like Compose UI, Material 3 for modern UIs, Room 2.7 for local data persistence, and Ktor 3 for networking. The architectural patterns taught, including MVVM and Clean Architecture, are standard in professional Android development. Building a real-world crypto wallet app, complete with error handling and robust testing, equips you with highly relevant, in-demand skills for the Android ecosystem.

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Fintech Mobile Application Developer

A Fintech Mobile Application Developer creates specialized mobile applications for financial services, such as banking, trading, or payment systems. This course offers an unparalleled opportunity to enter this exciting field, as the core project is "CoinRoutine," a feature-rich virtual crypto wallet app. You will learn to connect to live crypto data APIs using Ktor 3, implement portfolio management with persistent local databases (Room 2.7), and design secure, user-friendly input for simulated buy and sell features. The practical experience gained from building a real-world financial application, coupled with robust error handling and advanced testing, makes this course exceptionally well-suited for aspiring Fintech Mobile Application Developers.

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iOS Application Developer

An iOS Application Developer creates applications specifically for Apple's iOS ecosystem. This course, "Ultimate Compose Multiplatform: Android/iOS + Testing," directly prepares you to become an iOS Application Developer by teaching how to build native-performing applications for iOS from a single Kotlin codebase. You will gain hands-on experience implementing platform-specific features like Biometric Authentication (Face ID), managing permissions, and refining the app with custom animations. The course's practical project involving a virtual crypto wallet ensures you understand how to integrate real-time data, manage persistent storage with Room 2.7, and craft user-friendly interfaces with Compose. This unique approach empowers you to deliver high-quality iOS experiences.

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Kotlin Software Developer

A Kotlin Software Developer specializes in writing software primarily using the Kotlin programming language across various platforms. This course is an excellent pathway to becoming a highly skilled Kotlin Software Developer, as it centers entirely on building a complex, real-world application with Kotlin 2 and Compose Multiplatform. You will deepen your Kotlin expertise by implementing advanced concepts such as clean architecture, MVVM, asynchronous API calls with Ktor 3, database persistence with Room 2.7, and dependency injection with Koin 4. This project-based approach ensures you don't just learn syntax, but understand the "why" behind every decision, fostering deep proficiency in Kotlin for modern application development.

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Software Development Engineer in Test Mobile

A Software Development Engineer in Test Mobile, or SDET, focuses on designing, developing, and executing automated tests for mobile applications, integrating closely with development teams. This course prepares you comprehensively for this role through its dedicated modules on "Bulletproof Your Code with Testing." You will gain expertise in writing Unit Tests for ViewModel logic, mastering Kotlin Test, Turbine, and AssertK to ensure business rules are correct. Furthermore, you will learn Compose UI Testing to verify screen behavior and appearance. This hands-on experience with robust testing methodologies ensures that an SDET Mobile professional can build highly reliable and stable mobile applications.

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Mobile Application Architect

A Mobile Application Architect designs the high-level structure and technical standards for mobile applications, ensuring scalability, maintainability, and performance. This course provides crucial knowledge for an aspiring Mobile Application Architect. It immerses you in professional-grade architectural patterns like MVVM (Model-View-ViewModel) and Clean Architecture, demonstrating how to build scalable, maintainable, and testable applications. You will learn to manage dependencies cleanly across shared and platform-specific modules using Koin 4 and implement robust error-handling systems. This deep understanding of structural decisions and their impact on application stability and future growth is foundational for architecting successful mobile solutions.

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User Interface Engineer Mobile

A User Interface Engineer Mobile specializes in building the visual and interactive elements of mobile applications, focusing on user experience. This course is highly relevant for a User Interface Engineer Mobile, as it dives deep into creating dynamic and aesthetically pleasing UIs using Compose Multiplatform and Material 3. You will master techniques like using Compose Canvas for charts, implementing custom TextFields with input validation and visual transformations, and developing applications that fully support Light and Dark themes. The emphasis on clean, user-friendly input and advanced platform integration, including custom animations, ensures you can craft intuitive and polished mobile interfaces.

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Mobile Solutions Consultant

A Mobile Solutions Consultant advises businesses on their mobile strategy, technology choices, and development processes. This course can be highly beneficial for a Mobile Solutions Consultant by providing a comprehensive, practical understanding of modern cross-platform mobile development. You will master Compose Multiplatform, enabling you to speak authoritatively about leveraging a single Kotlin codebase for Android and iOS. The detailed exploration of architecture (MVVM, Clean Architecture), core technologies (Ktor 3, Room 2.7, Koin 4), and testing methodologies will equip you to evaluate technical approaches, anticipate challenges, and recommend robust, future-proof mobile solutions to clients.

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Mobile Project Lead

A Mobile Project Lead guides development teams through the entire lifecycle of mobile application projects, ensuring successful delivery. This course may be helpful for a Mobile Project Lead by providing a comprehensive understanding of cutting-edge mobile development practices and project execution. You will gain deep insight into architectural decisions (MVVM, Clean Architecture), dependency management, robust error handling, and critical testing strategies (Unit and UI tests). This holistic view of building a feature-rich, real-world application from scratch, including debugging and addressing real-world issues, equips you with the technical and practical knowledge necessary to effectively lead and coordinate mobile development efforts.

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Developer Advocate Kotlin Multiplatform

A Developer Advocate Kotlin Multiplatform inspires, educates, and supports other developers adopting specific technologies, in this case, Kotlin and Compose Multiplatform. This course prepares you to become an "industry-ready Compose Multiplatform expert," which is an excellent starting point for a Developer Advocate Kotlin Multiplatform. The curriculum emphasizes understanding the "why" behind every decision, from architecture to UI polish, which is crucial for explaining complex concepts effectively. Mastery of bleeding-edge libraries and hands-on experience building a real-world application provides the credibility and deep technical knowledge required to champion the technology and guide a developer community.

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Full Stack Mobile Developer

A Full Stack Mobile Developer possesses skills across both frontend (mobile client) and backend (server-side) development. While this course focuses profoundly on the mobile client, it may be useful for a Full Stack Mobile Developer by building an exceptionally strong foundation in client-side architecture and interaction with backend services. You will master consuming real-time APIs with Ktor 3, handling network requests, and persisting data locally with Room 2.7, all within a clean architectural pattern. This deep understanding of how mobile applications interact with data sources and servers is invaluable for a full stack role, enabling seamless integration and efficient communication between client and backend.

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Frontend Data Visualization Specialist

A Frontend Data Visualization Specialist focuses on creating interactive and visually compelling representations of data within user interfaces. This course may be useful for a Frontend Data Visualization Specialist because it provides direct experience in using Compose Canvas to create a simple price chart. You will learn to visualize crypto price movements, supporting both Light and Dark themes. This hands-on practice in rendering dynamic graphical information, customizing UI elements for data representation, and integrating with live data sources can help build foundational skills for designing and implementing effective data visualizations on mobile platforms.

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Backend Application Developer

A Backend Application Developer builds and maintains the server-side logic, databases, and APIs that power applications. While this course focuses on client-side mobile development, it may be useful for a Backend Application Developer by providing a strong understanding of how client applications interact with backend services. You will master making robust API calls using Ktor 3, handling network responses, and parsing JSON data. This client-side perspective on API consumption and data contracts can lead to a deeper understanding of designing effective and developer-friendly APIs, fostering better collaboration and more efficient development cycles between backend and mobile teams.

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