Up band Jawbone, €129
The wrist band tracks both your sleep and activity patterns and allows you to enter your food and drink consumption, keep track of your mood and keep all of the data on your iPhone. The user interface is attractive and easy to use, and it's fascinating to find out just how much shut-eye you really get at night and how many steps you take in a day.
PROS: Amazing insight into sleep patterns; ergonomic design means it's comfy and unobtrusive; good battery life.
CONS: It ain't cheap; I often forgot to put it on, but that's my fault for ever taking it off!
Three mobile is the only Irish network offering the Up band to Irish customers until October 1. For information visit www.three.ie/ lifestyle