Fitbit Charge 3 Advanced Fitness Tracker (£130)
"The Charge 3 is the ultimate fitness tracker! It's waterproof so you can swim and shower with it, and it tells you how many steps you take per hour to motivate you to take more. It monitors your heart rate, sleep, and menstrual cycle and shows text and call notifications from your phone. The battery lasts a whole week!" — Jenny Sugar, staff writer, Fitness