You can find your apps domain name within the settings menu in the editor.
Settings > Domain
The domain name will always start with https://apps.webmateapps.com/ and will end with your unique app ID. Ensure the ‘S’ in HTTPS:// is included otherwise your app will not work.
You can use this URL to preview your application either within your browser (with limited functions) or in the Previewer App (full functions).
Unless you are an advanced user, please do not change your domain name otherwise your app may not work correctly.