OBJECTIVES: Smartphones have become a powerful instrument in academic life for medical professions worldwide. Global lockdown due to COVID-19 pandemic culminated in the closure of educational institutions and resulted in shifting to online teaching. In our newly implemented competency-based medical education curriculum (CBME) for medical graduates, self-directed learning (SDL) is one of the teachings-learning methods. Smartphones are an essential tool for SDL in medical school. This main objective of the study is to determine the usage of health apps in a tertiary care teaching hospital to encourage the medical students and compulsory rotatory residential internship (CRRI) to continue SDL process. METHODS: This cross-sectional questionnaire-based study was conducted for the period of 30 days for medical students and CRRI's at a tertiary care teaching hospital. The population was selected using convenient sampling method. This anonymous questionnaire was validated by the experts and the questions encompassing knowledge, attitude and perception (KAP Survey) of the students toward smartphone medical apps was utilized for this survey. RESULTS: Out of 582 participants, only 250 students (43%) have participated in the survey. Our study shows that 95% of students were handling android smartphones, and 84% of them were using various medical applications on them and it leads to SDL. CONCLUSION: The impact of the lockdown has increased SDL. Majority of the students (51.8-69.8%) have agreed that medical apps enhanced their SDL and helped them to study independently.