Theo Dõi Sức Khoẻ is a health and fitness application designed for iPhone users, offering comprehensive features to track and manage personal health data. Users can input health information such as heart rate, temperature, blood oxygen levels, and blood pressure through manual entry, image capturing of health devices, or by connecting compatible health devices. The app also integrates with Apple HealthKit to streamline data entry, ensuring that all information remains private and is not shared with third parties.

Additionally, the app provides alerts for abnormal health indicators and allows users to share their health information with family members and healthcare providers. It is important to note that Theo Dõi Sức Khoẻ serves as an informational tool and does not replace professional medical advice, diagnosis, or treatment. Users are encouraged to consult with healthcare professionals regarding their health conditions before making any decisions based on the app's data.