The Home + Guest app lets you securely and easily access your host's home with your smartphone! Simply click on the link sent by the owner to open the invitation. No need for any password or account creation. You will then be able to lock and unlock the door from the app in the simplest of ways. You can also read notes left by your host and easily share your access to other visitors. Home + Guest works exclusively with the Netatmo Smart Door Lock & Keys.