Woozworld App on Phone

I have just got the woozworld app yesterday in my phone but today I wanted to go to my friends unitz but she was offline but still I know that on woozworld you can still visit friends unitz when their offline so that's what I tried to do on my phone but I can't find the button that says I can go to my friends unitz. Can someone please help me how to go to my friends unitz in woozworld on the app for phone!!