I participated in this for a while, more than 2 weeks, but eventually got tired of taking pictures of all the food i was eating, especially since the picture taking app would fail regularly and I would have to retake the picture, sometimes several times. I probably would have continued participating if the app worked better. I probably should have informed them of my app problem and seen if there was a fix but the one time I contacted them with another issue I got a reply that felt robotic rather than directed to my specific question so I eventually gave up. Still, it's interesting research.

Jean

Jean