CVS Health is encouraging employers to cover Sleepio as an employee benefit, reports ABC News.

Through a six-week program, it’s supposed to help people fall asleep faster and stay asleep by using cognitive behavioral therapy. It’s encouraged by doctors because it tackles sleeping habits by changing people’s negative thinking patterns. But do sleep apps really work?

One expert at the University of Colorado says they do help provide certain information that your doctor may not have, like how long you’re sleeping every night.