Kotlin is a programming language that is used to create Android apps (and other applications, like JVM based server side programs) and is rising in popularity like a rocket – doubling in just 1 year.
Learn more about Kotlin here: https://kotlinlang.org/
My business courses:
Complete Freelancer: https://www.killervideostore.com/freelancer
Complete Entrepreneur: https://www.killervideostore.com/video-courses/complete-entrepreneur.php