If someone told you that you could lose weight by breathing into a device a few times a day, would you pay up? Lumen is hoping that you would. Its device analyses your nutrition – and divines your nutritional needs from a single breath. Or so it says. It works on the idea that your metabolism changes all the time depending on a few factors, including what you ate, how much you slept and so on.

Burning calories

How many calories are you burning right now? You don’t know? Lumen says it could tell you. If you sign up, the app will send you daily meal plans personalised to your own requirements. It’s like having a mini personal nutritionist, only you still have to cook all your own food.

lumen.me