You can access the SimpliSafe app with one username and password only. There's currently no way to set up guest permissions, which means anyone who can get into the app can also change system settings.  On the other hand, you can create four custom PINs for the SimpliSafe keypad. This helps you know exactly who entered your home, whether it was a house cleaner, guest, pet sitter, caregiver, or family member.  SimpliSafe says it's actively developing multiple user log ins, but no release date has been announced.