Once a niche space, the category of sleep solutions has exploded in recent years in the form of coaching apps, wearables and accessories that are designed to fit on the bed or “smart” mattress, reports CNBC.

But sleep medicine experts warn that wearables and apps aren’t a quick fix for everyone, claiming that the products are of mixed quality and many of them don’t help their users sleep better. In fact, some are having the opposite effect.

“People spent billions on weight loss and increasingly sleep tech, but they don’t listen to the free advice,” said Seema Khosla, a pulmonologist in Fargo, North Dakota, who runs the tech committee of the American Academy of Sleep Medicine.

Get the full story at cnbc.com