It’s not enough anymore to just go for a run for a bit and feel good about it! Oh no, these days we need to know exactly how many paces we’ve taken, how long it took, and how many calories we’ve burned in the process. There are quite a few apps available on your smartphone that can also be used, but for now we’re going to take a look at the two most popular fitness trackers on the market – the Fitbit Flex and the Jawbone Up – and put then head to head.

Comfort/Design: with no actual screen, the Jawbone Up has the upper hand by being a much smaller size, and is also much easier to put on and take off, while the clasp on Flex can come undone quite easily, leading to it going AWOL if you’re wearing it in bed. However, that lack of screen might be a dealbreaker for some considering the Up, and the Flex also comes in a fashion-conscious variety of colours.

App Functionality: apparently the Flex is very, VERY generous when it comes to tracking your workouts, with the step count and calories burnt much higher than what they should be. That being said, the Flex’s presentation is far more visually appealing, as opposed to the Up’s app aesthetic which looks like it wouldn’t be out of place at an end of year revenue meeting.

Durability: both the Flex and the Up are water resistant, but not waterproof. Which basically means yes, you can wear it in the shower (although why you’d be working out in the shower is beyond us), but don’t keep them on if you go swimming. Battery life goes to the Up, which should go a full week without needing a recharge, as opposed to the Flex, which goes flat after about five days.

Price: the Fitbit Flex comes in around €75, while the Jawbone Up should set you back around €100.