I have only one Kuna, but I see many show up in the list
This is an error on an early version of the Android app. Please update your Android app to the latest version by going to www.getkuna.com/app on your Android device.
I do not see any Kunas show up in the list
Kuna uses Bluetooth LE (otherwise known as Bluetooth 4) for setup. You'll need to be within five feet of the Kuna you're trying to set up, and have Bluetooth turned on, on your phone. If this still happens, try rebooting your phone and launching the Kuna app again.