In the next few months, residents at a handful of buildings in the city will be able to walk up to their apartment doors and go inside without fumbling for keys. And if the dog walker or cleaning service comes by while they are out, residents can use an app to let them in remotely. Ditto for deliveries.

Keyless entry systems are starting to make their way to your apartment door. While smart locks have been available to individual homeowners for a few years, developers and property management companies have been hesitant to lose the key, citing the cost of upgrading hundreds of locks and the risk of losing money if the technology goes the way of Betamax.

Now that’s starting to change.

Latch, a new keyless entry system from a two-year-old start-up with the same name, is being introduced at a range of properties, from a four-unit East Village walk-up to a 431-unit luxury doorman rental in Chelsea, managed by real estate firms that have invested in the technology, like Corigin and Pan Am Equities. KISI, another keyless entry provider that has made strides in offices, is also turning its attention toward residences, with plans to roll out the system at a new 570-unit development on Staten Island in March.

For residents, especially those who make heavy use of on-demand deliveries, the pitch is control and convenience. Instead of doling out keys to your pet-sitter, contractor or houseguests, you can issue a virtual key. Instead of worrying about extra keys floating around that you lent out but never got back, you can simply disable access.