 This study examines free COVID-19-related mobile apps developed or supported by governments in East and Southeast Asia, highlighting their key characteristics and functions. The results show that most of the apps were intended for the general public, with health monitoring being the most common function. The majority of mobile apps emerged close to the commencement dates of other public health policies in the early stages of the pandemic. Additionally, these apps have evolved by expanding their functions for COVID-19 vaccination management. This article was authored by Bohili, Cd Isha Ibrahim, and Taiying Zhang.