If you’re having trouble motivating your patients to change their sleep habits, a sleep tracking device might help, CBS News reports.

Personal sleep trackers seem like a great investment for anyone suffering from insomnia or sleep deprivation. But are they accurate?

“The reason why these devices are so good is it puts greater emphasis on sleep,” Michelle Primeau, clinical instructor at the Stanford Center for Sleep Sciences & Medicine told CNET reporter Sumi Das. “Most adults in the U.S. are somewhat sleep deprived.”

Fitness trackers with sleep tracking capabilities, such as Fitbit, work by keeping track of how much you toss and turn in your bed to provide data on your sleep quality. This is done with accelerometers.