Good day! It is not so simple question. Firstly you should understand key features of future app, involved technology, development cost and required team structure. If you don’t have experience in these things I recommend you to use professional help. As I know Mangosoft developers provide modern services in healthcare development, here you can check them – use of mobile apps in healthcare. Hope this will help you.
Personally I believe that you need to trust these questions to some real professionals for example, you may visit this website on https://redwerk.com/industries/healthcare-it/ and learn more about this service. I hope that it will be useful for you so I wish you all good luck here guys.