Please make sure that you have enabled "Unknown sources" in the smartphone settings. This will allow you to download the app.
Activate unknown sources:
Go to "Security" or "Applications" in your smartphone system settings (varies depending on the device) Note: You can use the search function in the settings instead (search term: Installing unknown apps).
If necessary, select source (Google Chrome browser)
Activate "Unknown sources" permission/Trust this source.
Confirm with "OK".
When you start the app, you will be asked for permission to access the camera and microphone. You have to agree to both accesses. In addition, all notifications from Harmony should be allowed. This way, notifications can be sent to you when new events occur. n.
Helpful could be: Are there any special requirements for the Android smartphone?