Note for iOS 14 users - when installing or reinstalling the Whole Home Wi-Fi app, iOS 14 will now prompt you to give it access to your local network. You should allow this so the app can detect all the Whole Home Wi-Fi discs in your home. You can do this by selecting ‘Ok’ when you see the below screen
If you select “Don’t allow” your Whole Home Wi-Fi network will continue to work fine but the app will not be able to detect the discs and therefore will not function normally. If you want to later give access to the app, you can either uninstall and reinstall the app, or go to Settings on your IOS device ->Privacy->Local Network->Whole Home Wi-Fi->Toggle the button ON (green).