Abstract
The article reveals that creating mobile applications separately for Android and iOS is becoming a complex and costly process. There is a need for a common solution that will simplify the process of development, support, testing and deployment on various platforms. This solution should standardize the process of creating mobile applications.React Native, created by Facebook, represents a significant milestone in the development of crossplatform mobile application development. Thanks to an active and powerful community, React Native has become the most popular tool for creating cross-platform applications. However, Google decided to develop its own solution, Flutter, after carefully analyzing the advantages and disadvantages of React Native. Flutter is focused on optimizing for mobile devices and strives to provide developers with a complete and definitive solution for creating cross-platform applications.This article analyzes the key characteristics of React Native and Flutter, researching and comparing these characteristics in order to identify the reasons for their differences. The authors of the article hope that the results of the study will help improve cross-platform development and ensure further progress in this area.