Badi allows you to post adverts for a fee, or search through adverts in order to find housemates and flatmates. The aim is that both parties share rent and the cost of bills. You can report users for obscene behavior, but it doesn't really vet its users, so you will come across a mixed bag of personalities. The app claims to be free, but that is only partially true. It is free to browse and search, but if you want to post adverts, then you will have to pay.