Fill in your details and your email address. We send you a code by email: as soon as you enter it, your account is open. There is no password to remember.
It is the same account either way. You are looking for a home today and may be offering one tomorrow: nothing makes you choose now, or open a second account.
Your email address is only used to sign you in and to notify you; your number, only to reach you. Neither appears on a listing, nor is passed to a landlord or an applicant.