(Disclaimer: I've only ever made stuff in US, but https://fhirnorth.mohawkcollege.ca/ looks interesting)
(Confusing - as it exists today is way to make health apps with OAuth2 with REST for patients, providers)
SMART = Substitutable Medical Apps, Reusable Technology
FHIR = Fast Healthcare Interoperability Resources
(Confusing - as it exists today is way to make health apps with OAuth2 with REST for patients, providers)