SLEEP TIME Free (iOS and Android) azumio.com
A sleep tracker app with cycle analysis software developed with Stanford University, what makes this app stand out is its audio. Choose from a range of natural soundscapes to lull you to sleep or rouse you when you’re snoozing – you choose the 30-minute window in which you’d like to be awakened. A clever app from the University of Michigan that calculates how to tackle jet lag before and after your journey, by using light and darkness to support your body’s natural circadian rhythms. Tell it where and when you’re traveling and it will create a schedule of light, dark and sleep for you.