Ok, I understand.
nostr:nprofile1qqs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccpzemhxue69uhk2er9dchxummnw3ezumrpdejz7qgkwaehxw309a5xjum59ehx7um5wghxcctwvshszrnhwden5te0dehhxtnvdakz7qrxnfk is who develops #bitchat Android version.
He links to the official app on the Play Store here:
nostr:nevent1qqstvh3vszau7l0vhgpn4zz9w0unvy9tgyy3pq5j0kdveuzr7yqc0tgpr9mhxue69uhhyetvv9ujuumwdae8gtnnda3kjctv9upzq5xeflpdskqvdq4swxj59793uvdzqzc9pzatjk3nhmcg2h0js8trqvzqqqqqqyp2z0w8