The article is devoted to the study of determining the best methods and tools for cross-platform development of mobile applications, allowing to accelerate the process of writing application program code. The analysis of the existing technologies used to write mobile applications is carried out, their advantages and disadvantages are considered. The nuances of using the React Native framework, the mechanism of its work, the advantages of working with it are described. The data on the interest of developers in the React Native framework, search trends, the number of downloads of its installation package have analyzed.