Keymitt is smart-lock retrofitting device that you put on top of your key and lock from the inside of your home. Once in place, you will be able to open the door using your smartphone. It comes with a friendly but feature-packed app which makes it ideal in dealing with home access routines like letting in family and friends, contractors, and guests. Giving access to someone is as easy as sending an email and you can specify the time and the duration of the given access. Keymitt offers all of this and also lets you keep your own trusted lock and door intact.