Sleep is mysterious. But sleep-tracking apps promise to help you understand when and how you cross the threshold between waking and sleeping. Sleep is very important. It is important that our sleep habits have a direct impact on our cognitive functioning, emotional stability and overall health. As sleep medicine evolved along with our awareness of our sleep cycles and their drastic impact on our bodies, people became more concerned about their sleep quality and duration. The result? More and more people are starting to track their sleep with tools and apps.
Read More: How Much Does It Cost To Develop an App What do sleep trackers monitor? Most wearable devices typically track a standard set of sleep-related metrics. In particular, the sleep stages have become an area of great interest to consumers. This is important knowledge, because our sleep time directly affects how refreshed we are the next day. Most trackers generally divide the wearer's sleep stages into "light sleep" and "deep" REM sleep. More sophisticated devices can provide users with more detailed measurements such as heart rate and body temperature. They can