Assessing User Experience of Indonesian m-Health PeduliLindungi Mobile-Apps with the User-Centered Cognitive Walkthrough ApproachIn April 2020, KOMINFO announced the mobile-based e-Health app PeduliLindungi Mobile-Apps (PLMA). The Indonesian government uses this app to track and stop COVID-19. PLMA monitors, warns and stops Covid-19. Residents must use PLMA, downloaded over 10,000,000 times, according to KOMINFO. However, users criticized PLMA for application failures, breaches, and incorrect user data. On September 29, 2021, 470,521 Play Store users gave it 3.8. The app's PLMA score suggests revision. PLMA addresses navigation, functionality, connectivity and performance challenges, data security, and accessibility. User Experience and User Interface studies of PLMA have yielded disappointing results. This study evaluates the PLMA user experience. User-Centered Cognitive Walkthrough (UC-CW) is a cognitive walkthrough development strategy. The evaluator gives mobile app users scenario-based assignments and various questions to identify learning issues. This method can study users' cognitive processes when utilizing new systems. Ten PLMA users were analyzed. Participants completed most tasks, indicating a satisfactory user experience. However, particular difficulties and recommendations have identified possibilities for development, such as adding notification features, updating the start page, enhancing user data security, introducing customizable vaccination timings, and strengthening HP number validation. This study recommends measuring user experience and encourages application developers and policymakers to focus on the issues affecting the Mobile-Apps m-Health PeduliLindungi application in Indonesia. PLMA can support public health initiatives, especially during the COVID-19 epidemic, by making its health-related platform more user-friendly, efficient, and secure.