Google's open source, cross-platform Flutter UI toolkit, which started with a mobile focus, boosted its Web development tooling and has embraced Swift for native iOS projects and Kotlin for Android.

Since then, Google took this a step further by making Kotlin its preferred language for writing Android apps in 2019 — and while plenty of developers still use Java, Kotlin is quickly becoming ...

Others top languages with over one million users include C++, C#, Visual tools, Kotlin, Swift, Go, Ruby, Objective C. Rust is used by 600,000 developers while Lua is used by 500,000 developers.