In three months, I've gone from 201 to 173, with a few minor tweaks in my diet. The app works if you don't lie to it. And I've learned all kinds of things I never knew about caloric deficits, plateaus, metabolism, and so on. My wife is using it now, and she's already down 15 pounds in about 2 months. Strongly recommend. The only downside I have now is I look like I borrowed someone else's clothes - haven't gotten around to buying smaller stuff yet.