Somewhere between $16 billion spent on sleep tracking devices in 2025 and the 14% of tracker users now showing signs of clinical sleep anxiety, something went very wrong.
Researchers have a name for what went wrong. They call it orthosomnia. It is the condition where obsessing over your sleep score actually makes your sleep worse. It is a behavioral pattern where someone becomes so focused on their sleep data that the tracking itself interferes with their ability to sleep well. The pursuit of perfect metrics creates anxiety, and that anxiety disrupts sleep. A 2024 cross-sectional study of 523 people found that up to 14% of wearable sleep tracker users met criteria for orthosomnia, depending on how strictly you define the term.
Let that sit for a second. You bought a device to sleep better. The device is making you sleep worse. And the device probably isn't even telling you the truth about your sleep in the first place.
What These Devices Actually Know
The marketing is confident. The science is considerably less so.
Validation studies report over 90% accuracy for sleep-wake detection versus polysomnography, but only moderate agreement (50% to 86% sensitivity) for specific sleep stages. Overall, wearables reliably capture broad sleep patterns and disruptions, though stage estimates can be biased and should be interpreted as trends rather than clinical measurements.
That 50 to 86% range for sleep stage detection is the number nobody in the marketing department wants you to notice. Your Oura Ring or Apple Watch is essentially guessing, sometimes very well, sometimes not at all, when it tells you how much deep sleep you got. Across 11 consumer sleep trackers tested against the gold standard of polysomnography, the highest accuracy score was 0.69 and the lowest was 0.26 on the F1 scale. That low end is barely better than chance.
The specific failure mode is consistent across every study. Research consistently shows that wearables tend to overestimate sleep efficiency and underestimate wake time. All tested wearables significantly overestimated sleep efficiency by 2.20% to 10.19%, and significantly underestimated wake time by 11 to nearly 40 minutes. If a device consistently tells you that you slept better than you did, it is not helping you understand your sleep. It is flattering you.
There is one thing these devices do well, total sleep time. Nightly estimates for total sleep time were within 10 minutes of the gold standard for all tested devices. That is genuinely useful information. But it is also the information you could get by just looking at the clock when you go to bed and when you wake up.
Proprietary algorithms are rarely disclosed or standardized, and software updates, often unannounced, can alter sleep scoring, undermining consistency and clinical reliability. So the score that ruined your Tuesday morning mood might have been generated by an algorithm that changed overnight. You will never know.
The New Industry Selling You the Problem and the Solution
The wearable sleep tracker market is now worth approximately $16.5 billion in 2025, and is projected to reach $40 billion by 2034. That is a lot of money riding on you believing your sleep is a problem requiring measurement. Layer on top of that the exploding market for metabolic wearables: the continuous glucose monitor is now being used not only for diabetes management but also for wellness, athletic performance, and early detection of metabolic issues, with companies like Levels, Nutrisense, and Signos offering direct-to-consumer programs. Now you can stare at your glucose during the night you couldn't sleep because your Oura Ring gave you a 62 recovery score.
I want to be clear about something. Some of this technology has real clinical value. As of the end of 2024, the Apple Watch and Samsung Galaxy Watch have obtained FDA clearance for the identification of individuals at risk for moderate to severe sleep apnea. Withings received EU approval for this function in early 2025. That is worth taking seriously. Sleep apnea goes wildly underdiagnosed, and a consumer device that flags it is genuinely useful.
But that clinical use case, screening for a serious medical condition, is very different from refreshing an app at 7 a.m. to find out whether your REM percentage was good enough. Experts now recommend avoiding overinterpretation of sleep staging data, which is less reliable and not clinically important for treating sleep disorders. The focus should be on behavioral trends and multiday averages instead of nightly readings.
The industry knows this. It just doesn't pay to say it out loud.
Three Things That Will Actually Help, All of Them Free
If you sleep 5 hours a night and your Whoop says your strain score is suboptimal, I have news: the Whoop is not the problem. If you are drinking two glasses of wine before bed and waking up tired, your Oura Ring is not going to fix that by showing you a graph of your disrupted sleep. The data is downstream of the behavior. Focus on the behavior.
First: same bedtime, every night. Not within an hour. The same time. You do not need a sleep tracker to sleep well. Follow good sleep hygiene recommendations, such as going to sleep and getting up at the same time each day. Circadian rhythm consistency is the single highest-leverage intervention for sleep quality, it costs nothing, and no app can do it for you.
Second: cut the screens an hour before bed. Not because blue light is some magic sleep-destruction ray, but because scrolling is stimulating and your brain needs to wind down. Put the phone in another room. This is uncomfortable for about four days and then you sleep better. Done.
Third: look at how you feel during the day, not at a number on your phone. That is the only real metric. If you are alert, not crashing at 2 p.m., and not needing three coffees to function, your sleep is probably fine. If a 78 sleep score is making you anxious on a morning when you feel completely rested, the score is wrong. Trust the body over the algorithm.
If you already own a tracker and find it genuinely useful for spotting patterns, great. Use it for trends across weeks, not nights. Use sleep trackers as general tools rather than precise measures of sleep health. Set realistic goals, focus on long-term sleep patterns, and prioritize how you feel during the day over daily sleep scores. And if checking the app first thing in the morning is making you anxious, put it in the drawer. Take a break for a couple of days.
The basics are not boring. They are undefeated. Go to bed on time. Put down the phone. Wake up and ask yourself how you feel. That feedback loop cost you nothing and it runs on hardware you already own.
You do not need a protocol. You need consistency. Start there, right now, not Monday.
