Enter the time you’d like to wake up in our tool below and, based on 90-minute sleep cycles, we can tell you the best times to go to bed to wake up feeling fresh.

can be stored or read on your device to recognise it each time it connects ... For instance, whether you saw an ad, whether you clicked on it, whether it led you to buy a product or visit a ...

A review published in 2018 noted that phone use within one to two hours of going to bed impacts sleep ... the hormone that makes you feel tired, usually increase before you go to sleep.