You can link to another app from within the Employee App. The method varies depending on the target app and its configuration.
Link to the Web App
The simplest solution is to provide a link. In this case, you can only link to the web interface of the other app, which then promotes the native apps.
Use Universal Links / App Links
You can develop apps for iOS and Android in such a way that they are linked to a web page. iOS apps need to support universal links, whereas with Android it works via intents or app links.
All these link types will open the native app when clicked on a smartphone with the app installed. If users do not have the app installed, they will fall back to the web app. Universal links, intents, and app links also support deep linking if implemented.
Use the Flip Deeplink handler
If your app does not use Universal Links or App Links, you can create a deep link using a custom URL scheme for iOS devices and a web URI intent for Android devices. More information can be found on Flip Deeplink handler.
Why Is Linking to the App Directly Not Allowed via URL Scheme?
URLs such as myapp://open.this/url, which directly open the target app, are not supported. A safety feature on iOS devices prevents the use of direct URL schemes.