Flutter and Kotlin are the two leading technologies used to build mobile applications. Flutter is a framework, while Kotlin is a programing language. A framework is used for particular problems. In Flutter, we can have several inbuilt functions to complete an application, and programming languages do not have any limit for app development. Here, we are going to compare the differences between Flutter and Kotlin based on the various parameters. Before making a comparison, we are going to discuss in brief about these technologies.