Starting today, AT&T’s home automation and security service, which it calls Digital Life, is available in 15 cities across the nation.

AT&T said in January that it planned on launching Digital Life in March to eight cities, but delayed the launch until this month in order to offer the service in more markets. While Digital Life marks a new service for AT&T, the home automation field is already somewhat crowded with the likes of large incumbents, such as ADT, and competing services from Comcast, Verizon, Time Warner Cable, Cox Communications, and Bright House Networks.

Today Digital Life is available in Atlanta, Austin, Texas, Boulder, Colo., Chicago, Dallas, Denver, Houston, Los Angeles, Miami, Philadelphia, Riverside, Calif., San Francisco, Seattle, St. Louis and select areas of the New York and New Jersey metropolitan area.  AT&T said it planned on launching Digital Life in up to 50 markets by the end of this year.

On the home security side, Digital Life ties in with U.S.-based monitoring centers that respond to emergencies and alert police and fire agencies when the need arises.

"We know how important security is to our customers, and this was our top priority when we set out to build Digital Life," said Kevin Petersen , senior vice president, AT&T Digital Life. "People rely on their mobile devices more than ever, so Digital Life offers an easy and convenient way to secure their homes, protect their families and simplify their lives from virtually anywhere."

Like competing services, Digital Life is an all-digital, fully integrated, wireless home management system. The Digital Life application is available on most web browsers and apps are available for iOS, Android smartphones and Windows Phones.

The AT&T Digital Life application gives customers control over cameras, door locks, lights, thermostats, small appliances by setting alerts or programs to manage a home remotely.

The service is data agnostic, allowing subscribers to use any broadband or wireless provider. Digital Life has a secure log in system each time the app is opened from any Internet-connected device.

Digital Life comes with two price points. Simple Security, which includes home monitoring, a wireless keypad, recessed sensors and indoor siren, cost $29.99 a month plus a $149.99 installation and equipment fee.

Smart Security costs $39.99 a month and $249.99 for the installation and equipment. Smart Security offers a choice of three of the following features: motion sensor, carbon monoxide sensor, glass break sensor, smoke sensor or takeover kit.  Customers can also pick additional features, such as an Energy Package or Door Package, with addtional monthly charges.

While cable operators have partnered with SMC Networks, Technicolor, iControl and EcoFactor on their home automation and security systems, AT&T declined to say which vendors it was using for Digital Life.