Sleep tracking devices, such as smartwatches and connected rings, have gained popularity in recent years. These devices provide users with a "sleep score" and detailed reports about their sleep quality. However, experts caution that these scores are not backed by scientific research and are largely the creation of the manufacturers. Alanna Hare, a sleep medicine consultant at the Royal Brompton Hospital in London, points out that there is no recognized scientific foundation for a "sleep score." Neil Stanley, a sleep expert and author, explains that true sleep measurement requires tracking brain activity, which most consumer devices cannot do. Some users have become so focused on achieving a perfect sleep score that they engage in extreme behaviors. These include using white noise machines, taking magnesium supplements, or even taping their mouths shut to improve their sleep metrics. This phenomenon, known as "sleepmaxxing," can lead to orthosomnia, a condition where individuals become fixated on achieving perfect sleep, often to the detriment of their actual rest. Critics have raised concerns about the accuracy of sleep tracking devices. A complaint filed against the manufacturer of the Oura ring accused the company of using AI-generated sleep estimates that are no more accurate than a coin toss. These devices are unable to measure the physiological signals necessary to determine sleep quality or its different stages. Similar issues have been reported with other devices, such as the Galaxy Watch Ultra 2, which inaccurately reported both sleep duration and sleep scores. Many users place significant trust in the sleep scores provided by these devices, which can lead to anxiety and a cycle of worry about sleep quality based on numbers rather than personal feelings. Alexandre, a Galaxy Watch S6 owner, noted that the sleep score influenced his daily routines, even when he felt he had slept well. Jess Hill, an HR professional, relied on her Garmin watch to gauge her sleep quality until she realized the data didn’t always reflect the reality of how she felt. Experts recommend simple, non-technological approaches to improve sleep, such as keeping the bedroom cool, dark, and quiet, getting exposure to bright light in the morning, and engaging in light physical activity with a healthy diet. These methods, they argue, do not require the use of sleep tracking devices.