calculator

Hi, Im lucky enough to be on a Freestyle Libre trial and I am looking for recommendations on iPhone apps that will advise on how much insulin to inject depending on blood sugars and amount of carbs im going to eat. Thanks Gavin

I've been doing the low carb diet now for a few weeks. I'm getting the hang of it. Can anyone suggest a trustworthy site online that will calculate how much fat, carbs and protein I should have based on my present weight? I've found a couple of sites and they range from 1450 calories to 2200...