How often is Kotlin used?

In addition to Google, Kotlin is used by TikTok, Instagram and Microsoft OneDrive, and enjoys an impressive 15.99% market share. It has been used in the development of more than 131,000 apps and boasts more than 298 billion downloads worldwide .

Based on the results and the estimation of the professional developer population, about 2 million professionals have used Kotlin at least once in 2021. Among them, roughly 1 million professional developers use Kotlin as one of their 3 primary languages.

For how long have you been using Kotlin? Kotlin is used mainly for new projects (96%), and only 38% use it for pre-existing projects .