events such as drinking coffee, eating too much or having a stressful day affect your sleep quality??? Long term graphs - track sleep quality over time, see which days of the week you sleep best and much moreFollow our official Facebook page: <a href="http://www.facebook.com/SleepCycleAlarmClock-------------------------------------------------------">http://www.facebook.com/SleepCycleAlarmClock-------------------------------------------------------</a> REQUIREMENTS Ability to charge your phone by the bedAbil