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92 Best + Free Kotlin Courses & Certificates [2026]

92 courses compared 41 over 10 hours long Updated September 9, 2026

Ranked by Michael Kuhlman, CourseDuck's founder, from student reviews across every provider. How we rank

Our top picks

  • The Complete Android 14 & Kotlin Development Masterclass [Udemy]
  • The Complete Android Oreo Developer Course - Build 23 Apps! [Udemy]
  • The Complete Android 16 Course [Part 1]-Master Java & Kotlin [Udemy]
  • Android App Development Masterclass using Kotlin [Udemy]
  • One hour Kotlin guide for beginners [Udemy]
  • Kotlin for Java Developers [Udemy]
  • Kotlin for Beginners: Learn Programming With Kotlin [Udemy]
  • Jetpack Compose Crash course for Android with Kotlin [Udemy]
  • Kotlin for Android: Beginner to Advanced [Udemy]
  • Complete Kotlin development masterclass [Udemy]

About the best Kotlin courses

CourseDuck compares the 92 Kotlin courses listed here from 3 providers, 16 of them free, and ranks them from the 112,000 ratings and reviews their students have left, with the price, length and level of each one side by side. No course pays to be listed or ranked. As featured on Harvard EDU, Stackify and Inc. How we rank

Frequently asked questions

The most-reviewed Kotlin course in this category is The Complete Android 14 & Kotlin Development Masterclass by Denis Panjuta, with about 19,600 reviews at 4.5 as of October 2026.

Kotlin is a modern programming language that runs on the Java Virtual Machine and works alongside existing Java code. It is used for Android apps and for server-side development. Courses here cover Kotlin fundamentals, Android app development, Jetpack Compose, coroutines and Spring Boot back ends.

Average
$136,575 a year
Middle half earn
$120,500 to $154,500 25th to 75th percentile
Full range
$83,500 to $171,500

Share of US job postings in each pay band; the dark bar holds the average, the striped bars the 25th and 75th percentiles. Source: ZipRecruiter salary data collected in 2020-21, when this FAQ was first written; pay has moved since, so treat it as a rough guide.

Paid Udemy video courses include a certificate of completion when you finish; free courses and practice-test-only courses do not. It shows you did the work, but it is not an accredited qualification. LinkedIn Learning gives a certificate of completion for most of its courses as part of the subscription.

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92 Filtered Courses
The Complete Android 14 & Kotlin Development Masterclass
provider

1

The Complete Android 14 & Kotlin Development Masterclass (2024)

4.5
(19,558 reviews)
byDenis Panjuta

Sixty-six hours of Kotlin and Android build-alongs from Denis Panjuta, split between a newer Jetpack Compose track and an older XML one, with shopping list, wishlist and music apps.

Best for: Total programming beginners who want to build a stack of small Android apps and don't mind that a big chunk of the syllabus uses older XML layouts.

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Pros
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Cons
    • No programming background assumed; Kotlin basics are taught through a rock paper scissors game before any app.
    • Lots of real apps to build: unit converter, shopping list with maps, Room database wishlist, music, quiz and drawing apps.
    • Covers both Jetpack Compose and older XML layouts, useful for anyone who will touch legacy Android code.
    • Reviewers call the explanations clear and simple, and the 4.5 rating from about 19,500 reviews is solid.
    • Low-star reviews say code gets typed without the why; null safety and coroutines are barely explained.
    • Android Studio has changed since the November 2024 update, so some lessons need fixing to compile.
    • Structure jumps between the new Compose track and the older Android 12 XML track; Firebase with Compose is thin.
$89.99 Certificate Length: 66.5h
The Complete Android Oreo Developer Course - Build 23 Apps!
provider

2

The Complete Android Oreo Developer Course - Build 23 Apps! (2025)

4.3
(17,739 reviews)
byRob Percival

A 2017 project-first Android course from Rob Percival and Nick Walter: 23 build-along apps in Java and Kotlin, 92,000 students, and reviews that say it is showing its age.

Best for: Total beginners who learn by copying along and want Instagram, Uber and Flappy Bird clones on a phone before any theory.

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Pros
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Cons
    • Twenty-three build-along apps, from an Instagram clone to Flappy Bird, so there is always a project on screen
    • Starts from zero with an Android Studio tour and a Java section, then adds Kotlin, Android Wear and an ARCore taster
    • Nick Walter debugs live by googling and reading Stack Overflow, which students say taught them to fix their own errors
    • Covers publishing to Google Play, ads and a marketing website, not just the coding
    • Built on Android Studio 3.0.1; reviewers say the downloaded code often will not compile without major changes
    • Fast pace with little explanation of why a line of code is there, a common two-star complaint
    • One reviewer says the database work leans on Parse over Firebase; another found the Uber clone's solution code broken
$149.99 Certificate Length: 37.6h
The Complete Android 16 Course [Part 1]-Master Java & Kotlin
provider

3

The Complete Android 16 Course [Part 1]-Master Java & Kotlin (2025)

4.4
(6,815 reviews)
byAbbass Masri

A 65-hour, Java-first Android bootcamp with 784 lectures, MVVM and Firebase projects and a Kotlin track tacked on, refreshed in late 2025, strong early and weaker later.

Best for: Complete beginners who want Java taught first, then dozens of small Android apps before MVVM and Firebase.

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Pros
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Cons
    • Java basics and OOP taught from zero before any Android code, with 10 coding exercises
    • Covers modern Jetpack pieces: Room, Retrofit, Paging, WorkManager, Navigation and MVVM
    • Big Firebase projects, including a Journal app and a WhatsApp-style chat clone
    • Refreshed December 2025, and reviewers say the early sections are clear and easy to follow
    • Later sections often read code off the screen with little explanation, per many low-star reviews
    • Some projects ship with missing or wrong source code, and audio is noisy in places
    • Q&A replies are described as two or three words, and much of the content is free on his YouTube
$94.99 Certificate Length: 65.3h
Android App Development Masterclass using Kotlin
provider

4

Android App Development Masterclass using Kotlin (2025)

4.3
(6,194 reviews)
byTim Buchalka

A 62 hour, project based Android course from Tim Buchalka that teaches Kotlin from zero and goes unusually deep into SQLite, ViewModel and app architecture.

Best for: Patient beginners who want to understand why an Android app is structured a certain way, not just copy a working screen.

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Pros
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Cons
    • About 23 syllabus hours on SQLite, ViewModel and LiveData; one reviewer found it deeper than a rival course
    • A dedicated 25 lecture Kotlin section before any app work, praised even by students who rated the course low
    • Apps grow in complexity, ending with a 60 lecture task timer with multi table SQLite and reports
    • Two students report publishing their own Play Store app after finishing
    • Leans on deprecated AsyncTask and multiple activities; no Compose, Navigation components or Retrofit
    • A second instructor takes over midway with a faster style, and some video segments go blurry
    • Beginners say the jump after the calculator app feels like copying code rather than learning
$84.99 Certificate Length: 62.2h
One hour Kotlin guide for beginners
provider

5

One hour Kotlin guide for beginners (2018)

4.1
(874 reviews)
byTutlets Kkang

A free 80-minute Kotlin syntax primer for Java and Android developers, praised for clear, working examples, though it has not been touched since 2018.

Best for: Java or Android developers who want Kotlin's syntax and null safety explained in one sitting.

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Pros
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Cons
    • Covers variables, collections, null safety, functions and OOP in 16 lectures and about 80 minutes
    • Reviewers say every code example works as shown, which makes it a handy reference
    • Points out exactly where Kotlin differs from Java, which one Java developer singles out as its strength
    • Free and fluff-free; even a three-star reviewer calls it a good quick review
    • Not updated since June 2018; the IntelliJ setup lecture no longer matches the current IDE
    • Too few examples and little on why to use features like abstract classes
    • No quizzes, coding exercises or assignments, and no captions
Free Certificate Length: 1.3h
Kotlin for Java Developers
provider

6

Kotlin for Java Developers (2025)

4.6
(5,558 reviews)
byTim Buchalka
Use your Java skills to learn Kotlin fast. Enhance career prospects and master Kotlin, including Java interoperability

iconWhat You'll Learn

  • Create Kotlin programs
  • Understand the differences between Java and Kotlin
  • Understand how Java and Kotlin programs interoperate
$74.99 Certificate Length: 16.8h
Kotlin for Beginners: Learn Programming With Kotlin
provider

7

Kotlin for Beginners: Learn Programming With Kotlin (2021)

4.6
(4,911 reviews)
byPeter Sommerhoff
Learn Kotlin from scratch! Grasp object-orientation and idiomatic Kotlin to realize coding projects and Android apps!

iconWhat You'll Learn

  • Create professional applications using Kotlin, the new Java-based programming language developed by Jetbrains
  • Understand the concepts of the Kotlin language and how it integrates neatly with Java
  • Understand the basics of object-oriented software development, the most important development paradigm
  • Understand the principles behind other object-oriented languages like Java, C++, PHP, C#, Scala, or Swift
  • Use Intellij, the popular Java (and Kotlin) IDE, to write code effectively and professionally
  • Read code and write your Kotlin code as well
$74.99 Certificate Length: 6.6h
Jetpack Compose Crash course for Android with Kotlin
provider

8

Jetpack Compose Crash course for Android with Kotlin (2022)

4.5
(4,095 reviews)
byCatalin Ghita
Modern Android apps with Jetpack Compose and integrations: MVVM, Coroutines, ViewModel, LiveData, Retrofit, Navigation

iconWhat You'll Learn

  • How to create Android UI and layouts directly in code with Kotlin
  • Modern Declarative way of creating UI in Android
  • How to use Compose with other Jetpack libraries: ViewModel, Navigation, LiveData
  • How to use Compose with other popular libraries: Coroutines, Retrofit
  • How to integrate Compose in a MVVM architecture
  • How to create beautiful animations with Jetpack Compose
$74.99 Certificate Length: 10.9h
Kotlin for Android: Beginner to Advanced
provider

9

Kotlin for Android: Beginner to Advanced (2018)

4.7
(3,227 reviews)
byDevslopes by Nathan Sevedge
Kotlin is an expressive, concise & powerful development language on Android. Learn everything you need to know to start

iconWhat You'll Learn

  • Build professional, fully functional apps using Kotlin
  • Apply for Jr. Android app development jobs
  • Submit apps to the Google Play store
$74.99 Certificate Length: 22.9h
Complete Kotlin development masterclass
provider

10

Complete Kotlin development masterclass (2026)

4.8
(3,181 reviews)
byCatalin Stefan
Master the fundamentals and advanced features of Kotlin development

iconWhat You'll Learn

  • Kotlin development
  • Kotlin coroutines
  • Functional programming
  • Object Oriented Programming
  • Kotlin language fundamentals
  • Kotlin extensions
  • Generics
  • Principles of software development
$84.99 Certificate Length: 30.9h
Android Jetpack Compose: The Comprehensive Bootcamp
provider

11

Android Jetpack Compose: The Comprehensive Bootcamp (2024)

4.5
(3,167 reviews)
byPaulo Dichone
Kotlin Android App Development: Firebase Firestore, Hilt & Dagger, ROOM DB, ViewModel, Navigation & Clean Architecture

iconWhat You'll Learn

  • Learn Clean Architecture and MVVM Patterns with Android Jetpack Compose
  • Master Jetpack Compose and Build Modern Android Apps
  • Build 7 Android Apps with Jetpack Compose and Kotlin - Use Firebase Firestore for the Backend
  • Master Modern Android Development Best Practices with Jetpack Tools and Compose
  • Leverage Hilt and Dagger and add Dependency Injection into a Jetpack Compose Android App
  • Build, from scratch, beautiful native UIs with Jetpack Compose - a Declarative approach for building moder Android Apps
  • Integrate Android ROOM Database into a Compose Application
$84.99 Certificate Length: 36.8h

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