This 'gold standard' sleep tracker is the closest I'll ever get to a real sleep study — 3 ways it has already improved my sleep, from sleeping longer to sleeping deeper

On the left, a close up of the Withings Sleep Tracker on a white sheet in our reviewer's bedroom. On the right, sleep tech writer Eve Davies sits up in bed checking her Withings Sleep App to assess her sleep score.

For years, my mom has been my equivalent of an ongoing sleep study, always asking if I had a good night's rest. Recently, however, I've started using the Withings Sleep tracker, $199.95 at Withings in stead, which not only enquires after my sleep but is helping me actively improve it. Sorry, mom, you've been upgraded.

Tested against clinical polysomnography, the gold standard of sleep studies, the Withings Sleep observes data such as movement, breathing and even heart rate to form an overall picture of your sleep.