While there are a wide variety of sleep trackers on the market, the 'SleepPhones' are the only wearable device that can tell when you are lucid dreaming. As a result, you can now track your dreams in addition to other sleep patterns.
Upon first glance, the SleepPhones simply appear to be a pair of soft headphones that are comfortable enough for sleeping in. However, the unassuming headphones are also equipped with a set of accelerometers and a tiny Bluetooth transceiver that allows the device to double as a sleep tracker. The headphones work by tracking a user's movements as they snooze and learning their sleep patterns over time. In turn, this data allows the headphones to switch on music when it senses that a user is in a deep-sleep. The idea is that hearing the music may cause users to recognize their dreamy state and go lucid.
Beyond its applications for lucid dreaming, the SleepPhones provide an excellent way for users to track their sleep patterns over time or simply listen to music more comfortably in bed.