Fitbit Flex 2, £44.99 (argos.co.uk)

It’s extremely accurate when monitoring the steps you take each day as well as the distance you travel. The progress towards your goal is simply shown on the tracker in the form of LEDs that light up, rather than statistics themselves. We love that it’s waterproof and can track the lengths and distance you swim and it’s got some great extra features too, including a reminder to move by alerting you when you haven’t managed 250 steps in an hour. It also has sleep monitoring and even a silent alarm that will wake you without disturbing your partner. 79/100