After defining the app’s purpose, target audience and selecting the platform (iOS, Android, or both) you can seek the help of experienced developers to help you create an eHealth mobile app. They will create a design that delivers the desired user experience (UI), execute the development process, incorporate features (tracking, push notifications, in-app purchases), test and collect feedback, launch app and promote it, and also maintain and update the app accordingly (don’t forget to consider privacy and data protection).
Remember to consult with healthcare professionals and legal experts during the development process to ensure compliance with regulations and best practices.