You've just woken up to the sound of your cat hacking up a symphony and you get up to investigate.
It 's 2.30am on a freezing January morning and the pager 's just woken you from a deep sleep in a snug warm bed.
If you've ever woken in the middle of night to brutal pain in your calf muscle, a list of cures for leg cramps is something you want to keep handy.
Your child might dislike being awoken during an episode, or may become very uncomfortable if woken up.
Moreover, the Fitbit Tracker allows you to delve deeply into your sleep habits by alerting you to how many hours you've slept, the quality of sleep you've achieved and the number of times that you have woken up during the night.