You can change the username once every 24 hours. You can change the email with a code sent to the new address. Changing the password asks you to sign in again. A referral code can be entered at signup or later from Profile, after the email is confirmed.
Sign in with Apple and passkeys are not available. Google and email are the sign-in methods.
Chat
Pinned chats stay at the top. Search can run across every chat, and it can filter by photo, video, link, or file. Starred messages are private to you, and one list collects stars from every chat.
A random chat in the app can be turned off. Matching can also be paused by admin. A quiet random chat with nobody recently online is closed automatically, and random chats are deleted after the number of hours set in admin.