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Compose Multiplatform - iOS/Android Development with Kotlin (Udemy.com)

Build Modern Mobile Apps with MVVM/Clean Architecture and 100% Shared UI. Single Codebase, two Platforms!

Created by: Stefan Jovanovic

Last updated August 2026

Our take

Based on the ratings of 538 students and a sample of their written reviews, the syllabus, the course as of August 2026. No course pays to be reviewed.

A short, project-based introduction to Compose Multiplatform from Stefan Jovanovic. Across 33 lectures and about 2.3 hours, the syllabus shows one app being built from scratch: a currency app that pulls data from a remote API with Ktor, caches it locally, and runs on Android and iOS from a single Kotlin codebase with a fully shared UI. It was published in April 2024 and updated in August 2026, and the last section is a set of course updates. The requirements list asks for basic Jetpack Compose, Android and Kotlin knowledge, and the reviews suggest that is the real floor, not a formality.

Reviewers who already work in Android like the density. One says the course gave them a working multiplatform template, and others say Stefan packs a lot into two hours with clear explanations. The complaints are consistent and loud. Roughly one in six ratings is three stars or lower, and almost all of them say the same thing: it moves too fast, and large chunks of code are pasted in rather than typed and explained. A few students also hit trouble with the Realm database, which one reviewer calls unmaintained, and swapped in a different one on their own. Others wanted deeper project setup coverage and a section on platform-specific cases like permissions.

Value depends on where you sit. On our mobile development list it sits beside Android-focused Jetpack Compose courses, and it is the pick for shipping to iOS and Android from one Kotlin codebase. Pace is the trade. Keep the source code open beside the video and be ready to pause a lot. For an experienced Android developer who wants a quick KMP starting point, it earns its spot. For a first-timer, the speed will hurt more than the short runtime helps.

Best forWorking Android developers who know Jetpack Compose and want a fast, working KMP template rather than a lecture series.
Skip it ifYou are new to Kotlin or Compose, or you learn best by typing code along at a steady pace with every line explained.

Pros

  • One real app covers networking, local caching, MVVM and Clean Architecture in 2.3 hours
  • Shared UI on both platforms, not just shared business logic
  • Updated August 2026 with a dedicated course updates section
  • One experienced Android developer says it works as a reusable KMP template

Cons

  • Pace is the top complaint across nearly every low-star review; code is often pasted, not explained
  • Uses Realm for local storage, which two reviewers found deprecated and replaced on their own
  • No coverage of platform-specific cases like permissions or notifications
Great explanation, Little bit fast but we have a source code so that we can check it side by side. In 2 hours of course, Stefan provide so much value.
Kishor Ramani, a student

Intermediate is accurate: the syllabus assumes Jetpack Compose, Android and Kotlin basics, and reviewers say beginners will struggle.

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What you will learn

  • Develop Android and iOS App from a Single Codebase
  • Develop Android and iOS App with Shared UI
  • Compose Multiplatform Framework
  • Working with a Local Database (MongoDB Realm)
  • Working with Network (Ktor)
  • Offline Cache
  • MVVM Architecture
  • Clean Architecture
  • Beautiful and Animated UI
  • Material 3 Components
  • Custom Theming
  • And more!

Course content

7 sections · 33 lectures · 2.3 hours of video 1 articles

  1. 1Introduction 4 free previews7 lectures · 18 min
  2. 2Project Setup6 lectures · 17 min
  3. 3Let's Build an App4 lectures · 19 min
  4. 4HomeScreen Header7 lectures · 33 min
  5. 5Currency Picker2 lectures · 14 min
  6. 6HomeScreen Body3 lectures · 10 min
  7. 7Course Updates4 lectures · 27 min

Who it is for

The instructor says it suits

  • Mobile App developers
  • Kotlin Developers
  • Android Developers
  • iOS Developers
  • Anyone who wants to build Mobile Apps for both iOS/Android with a Single Codebase

What you need before you start

  • Basic knowledge about Jetpack Compose
  • Basic knowledge about Android Development
  • Basic knowledge about Kotlin Programming

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Quality Score

No CourseDuck member has rated this course yet. Taken it? Give each part a thumbs up or down.

Content Quality
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Video Quality
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Qualified Instructor
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Course Pace
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Course Depth & Coverage
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Overall Score : 86 / 100

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Course Description

Build a Mobile App for Android and iOS with 100% shared code for business logic as well as UI! That’s right. With the help of Compose Multiplatform framework, you will be able to fully develop an app, for both platforms using single programming language, Kotlin.


Forget about Flutter, React Native and other silly frameworks. Compose Multiplatform is the Future of multiplatform development, that targets not just mobile platforms, but Web and Desktop as well!


This is a 2 hour, well organized and concise course, carefully crafted to teach you exactly what you need to know, to be able to achieve this goal, as quickly as possible. I’m not gonna waste a second of your time, like other 20 hour courses that you’ve had experience with before.


You’re starting this journey by introducing with some important concepts related to Kotlin Multiplatform development, requirements and other steps to prepare your environment.


After that we’re immediately starting with the project. The app itself is a simple Currency app that fetches a data from a third-party API and caches that data locally. The app will be able to work even without an internet connection. You’re going to work with both local and a remote data sources.


Both light/dark themes are supported.

New material 3 components.

Custom theming.

Custom UI components.

Smooth animations.


And more!


So what are you waiting for, it’s time to sharpen your skills and learn the right stuff.

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Instructor Details

Stefan Jovanovic

Hi, my name is Stefan Jovanović. I’m a Kotlin Multiplatform developer, designer and technology enthusiast. Love working on a new and exciting projects, sharing my knowledge with others, and always willing to learn more.

I believe that permanent education is the key to success. I’ve been working as a developer/designer for 6 years so far.

Have a lots of projects on my mind. I will be creating many useful courses in the future, and hope to hear from you as you enroll in one of them!


Kind regards

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Reviews

4.3

538 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Anonymized User on 5/25/2025

The pace was off. It was too fast someone learning KMP / CMP for the first time. Also at some places the explanantion was not proper. It could have been better by giving some examples and using Slided to explain the concept and then implement the concepts in code. Anyways great Content

By Gaël Piveteau on 5/22/2025

This is a really good formation, it goes fast and explanations are great. I did this formation with kotlin 2.1 and realm is deprecated in this version. I chose to replace it with Room. It is optional and I feel you could juste use the settings library to do the same. However I felt I needed to work with a database to "complete" this formation. Thank you for your good work :)

By Árpád Poprádi on 3/19/2025

A very good course into the modern KMP development. The teacher packs a lot of material into this 2 hours, which is good (you can always pause) so the course shows up a lot of side learning, which is also good. Thank you, Stefan!

By Igor Barros Teixeira on 2/21/2025

Good course to have a first contact with multiplatform application. It shows many technologies needed to build an app that access internet to fetch data, saves data locally, work with icons and beautiful UI. It seems a little bit faster than I expected to understand all technologies used.

By George Drayer on 11/30/2024

The content coverage was great, however it's incredibly difficult to code along during the lesson, due to the speed at which the lessons move; I had to pause every few seconds to catch up with whatever had been block-displayed on the screen. If you're happy to just read along with the provided completed codebase then this may not be an issue.

By Héctor Alpízar on 11/24/2024

Short and sweet. For me as Kotlin Multiplatform experienced developer was pretty straight forward. However, I was not able to access the source code on chapter 8 and Link https://github.com/stevdza-san/CurrencyApp. I got project not found. I would have liked something more complex, as navigation from one UI to other. I don't know if that's possible.

By Rosvalde Florient MANFO JIENGAP on 10/17/2024

I would say that I really appreciate how you go straight to the point. I already have a lot of experience with native Android development, and I think this course helped me better understand Kotlin Multiplatform and Compose Multiplatform, and how they work. I can also say that I’m liking Kotlin more and more. Thank you for sharing your experiences.

By Aliaksei Ivanouski on 8/30/2024

Thank you for an amazing course! The explanation of the various beneficial features of an application was excellent. One suggestion I have is to include a section on navigation between screens, as it’s an essential aspect. Overall, the course was fantastic. Thank you very much!

By Anonymized User on 8/22/2024

Svaka čast, svi tečajevi su ti top! I don't like the 50+ hours courses, so this is really great, especially if you're not a complete beginner. I needed this to remember some stuff, since I didn't do anything in android native for more than a year, so this was really great. I wish there are more courses like this, short and clear (best for devs who want to switch to another technology, or to refresh their knowledge)

By Kevin Schanz on 8/22/2024

This was a very informative course for Compose Multiplatform. The recorded videos for some lectures were filmed too fast -- there would be like a 3 second segment, where code imports were modified, editor windows were switched, an emulator was launched and a button was clicked in the IDE, so you'd have to repeatedly pause, rewind and scrub the video playhead a few times to figure out what actions are being performed. A couple improvements to the video pacing to enable students to follow-along would make this a 5-star course.

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