Lisa N -

Yes, that is part of the diff, but nowhere near all.

For instance every egg on FitDay is 1 carb, and every oz of cheese is at least 1 carb, and every cup of black coffee is 1 carb. There is no fiber in any of those foods, and Atkins calculates them at zero carbs.

I think that FitDay is much more accurate, even for those carbs that low on the glycemic scale and have much less insulin demand than do dextrose, sucrose and fructose carbs. They should still be counted, IMO.

At least it seems to be working for my weight loss efforts, so far. YMMV