e13803 Background: Breast cancer is the most prevalent cancer type amongst females of all ages and the highest reported cancer cases in Malaysia. Breast cancer survivors may have distinctive struggles. Inadequate recovery preparation can have a detrimental effect on the quality of life of breast cancer survivors. Digital health interventions (DHI) can enhance patient rehabilitation. Methods: This is an open-label feasibility study conducted at the University of Malaya Medical Center. The study involved 40 patients diagnosed with stage I-III breast cancer. They were randomly assigned to either the intervention group (12-week program with DHI) or the control group (follow-up at UMMC). Unfortunately, 3 patients withdrew from the intervention group during the study. This resulted in a study size of 17 in the intervention group and 20 in the control group. At the end of the 12-week period, we conducted individual interviews to explore the experiences of DHI users. The primary endpoint of this study was to evaluate the feasibility and acceptability of the smartphone application in enhancing the quality of life for breast cancer survivors. Secondary objectives included estimating the variability of body mass index, health, and physical and psychological status. Results: The study showed the engagement of breast cancer survivors with our Digital Health Intervention (DHI), indicating a 100% retention rate over a 12-week period. This emphasizes the accessibility of DHI, as shown by users logging in at least once within 12 weeks. Quantitative data analysis reveals that the DHI app's engagement rates are 53%, implying that users are logging in at least once a week and over 30% throughout the study period. Farago's study shows a 27-30% user retention rate for medical and health apps within 90 days. (5) Clinical outcome for both control and experimental shown not significant result with p>0.05, however we can appreciate absolute changes in intervention arm BMI. Qualitatively, we are able to code to utility and usability of the DHI apps. Users enjoyed the exercise module, valued admin support, and found the app intuitive. Users were engaged in exercise, diet, and psychology, while disengagement was associated with other social media platforms and personal motivation levels. Conclusions: Study showed a 100% retention rate and a promising 53% engagement rate, showing success in health app engagement. The feasibility study intentionally used a small sample for specific disease and patient demographics. Users reflect on app relevance in exercise, diet, and psychology. In summary, assessing the effectiveness of DHI in providing comprehensive support to cancer survivors requires larger-scale studies.