Malware researchers have spotted what they think is the first malicious Android app using the Kotlin language.

This post is an introduction to Kotlin for Android development. Learn how the language differs from Java and the basic syntax and layout.

Google has released the September 2025 security update for Android devices, addressing a total of 84 vulnerabilities, including two actively exploited flaws.

Here's what Meta's developers have learned from moving their code base from the Java programming language over to Kotlin.