It does not look like the official one.
#asknostr
That's confusing me .. in that a official one or a scam ?
https://play.google.com/store/apps/details?id=com.bitchat.droid
it says verse communication PBC
#bitchat
Discussion
Currently there are tons of fake bitchat apps out there! You can check out the real one directly from the account of jack at Nostr and X. (and calle's version is also recommended if you use Android)