I have now been using this app for the past 2 months, after trying several similar apps this one has been the best and easy to use app. At first it might be intimidating bit after a few times of using it you get the hang of it. And you get a lot of useful information with it, it has also been usual in helping me keep a track on my carb intake, I would definitely recommend you to try this app.
D.75a about One Drop: Better Health Today, v2.7