Smartphone users feeling overwhelmed by the onslaught of communications and devices vying for their time can turn to new apps to help them take a break and concentrate on other things.

More than 70 percent of consumers in the United States own a smartphone and the typical adult spends about 90 minutes a day on their device, an increase of 30 percent since last year, according to global information and measurements company Nielsen.

But new apps aim to make users aware of how much time they spend on their smartphones and to help them limit it.