The days of carting around a jumble of keys are coming to a close, thanks to new technology for home access controls in the form of keyless, cellphone-enabled locks for residences. Millions of people, all over the world, use the key-and-lock solution for safeguarding their homes every day. But today’s keys have gone electric, thanks to the evolution of smartphone.

More than half (56 percent) of Americans have smartphones today, according to the Pew Internet & American Life Project. And that number most likely is higher among people who have security systems.