The study examines user engagement and satisfaction with a chronic disease management app on the A-B-C platform. It explores demographic details and factors influencing engagement, including usability, features, personalization, social support, and accessibility. Specific app elements such as goal-setting, education resources, communication, reminders, and wearables integration are scrutinized, alongside user barriers like technological challenges, awareness gaps, time constraints, and privacy issues. Using a purposive sample of 200 participants, including patients, caregivers, healthcare professionals, and app users, data analysis employs descriptive statistics to inform app modernization efforts. The study demonstrates how usability and robust social support features influence positive user engagement. It also identifies areas for improvement in notifications, educational content, and accessibility. Key app features contributing to satisfaction include personalized goal-setting, comprehensive educational resources, and communication support, while challenges encompass technological barriers, a lack of awareness, time constraints, and privacy concerns. Recommendations include tailored marketing, feature enhancements, and addressing barriers, with proposed plans focusing on user education, data privacy, and app performance. Timely execution of these plans is crucial, with a focus on integrating data privacy measures and security software to ensure a trustworthy user experience.