Ron has devised an App that can be used with the Coronet.
The Coronet will work perfectly well without the App.
You do not need the App to use the Coronet.
About the Well Red App
It is for Android devices only at this stage.
An iOS version is coming, and when ready, it will be on this page.
It uses Bluetooth.
If your Android device doesn’t have Bluetooth, the App will not work.
For the App to work, your Coronet needs to be ON
Some Coronets use V-24 of the App and others use V-25.