Lumen

Biggest rip off. I waited 18 months for this and yes you can breathe into it to find out if you’re burning fats, carbs or a mix, but the food planning (written by some unqualified nutritionist with no taste buds) is just a mix of keto and carb cycling. Stick to buying the cheap chemist urine analysis sticks and save yourself a fortune. There’s no planning available you just have to breathe in the morning and hope that you have their random foodstuff in your fridge. Hopeless

The wait for this very promising and impressive device is far too long already. Happy to change my rating to 5stars, but in order to do that, you need to be able to actually have the device and use it. So far, seems only 4 backers got it, since last Thursday (?) but still no photos of them unboxing, no reviews-feedback-comments from them using it. Conclusion : a very generous 2.3m$ crowdfunding since last year and another 7m$ private funding since last year too, and so far we know (from Lumen) only 4 people that actually holding a box in a photo. So still waiting...