With Kefir ID, your life in Sunday City is secure. Go to settings and connect your guest account to Kefir ID. If you see the "Kefir ID connected" button, it means you've done everything right. If you run into any issues, contact us via the "Support" button.

Moreover, Kefir ID allows you to transfer your progress to another device on your own. Just sign in to your Kefir ID account on the new device.