My Kello displays "--:--"
If your Kello displays the bars "--:--" after setting it up, it means that it can't talk to your phone.
➡️ Kill the Kello app and restart it.
➡️ Make sure your phone is connected to the same Wi-Fi network as Kello's. Sometimes iOS and Android randomly connect to a surrounding Wi-Fi network (like an open network or a previously known network), so make sure in your phone's settings that it's connected to the Wi-Fi you've just set up in Kello.
➡️ Kello needs Multicast Routing to be enabled on your router in order to talk with your phone. Check on your router's settings if it's enabled.
➡️ Reboot your router and Internet box.