“I come from an age when an ‘app’ was an appetizer,” says Al Roker. “Not something you downloaded on your phone.” He’s quickly learning to change with the times.

Roker will play a significant role in a new app from “Today” that helps users with tips about wellness — including exercise, diet and more. A “Start Today” app soft-launched last year, with some fans able to beta-test it. Now NBC will put a more overt promotional push behind it, part of a bid to make “Today,” so closely identified with the mornings for seven decades, something that has stronger ties with a broader part of daily life.

The venture will take “Today” out of its usual competitive set — it battles every day for viewers with ABC’s “Good Morning America” and “CBS Mornings,” among other A.M. TV properties — and set it against dozens of digital outlets that deal with wellness.