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Typically a SMART on FHIR app is hosted on your server. However, it ; however, with SMART on FHIR, your app is launched from within an EHR (Cerner, Epic, HSPC Sandbox, SMART on FHIR Sandbox, etc). Throughout the development cycle, you will launch your app many times. See Launch Your App from the HSPC Sandbox for detailed instructions.
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When your application is ready for public viewing, you can publish it to the HSPC Gallery. Publishing your app to the HSPC Gallery is a great way to market your application and promote it at Healthcare conferences such as HiMMS. See Publish Your App to the HSPC SandboxGallery for detailed instructions.
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