How to add friends in Open app?

to add friends in open a chat app tap on settings in bottom right and then you can just tap connect contacts and how it works is that you just sync your contacts from iPhone it's not possible to search by username or anything like that and then your friends are basically labeled as friends and everyone is anonymous so even if you add like 10 people you don't know exactly who is who and then you can just try to chat on sensitive topics so that's the idea of this app that you can chat anonymously with your friends so yeah try that