Fatal flaw: no tracking
This app is excellent in calculating BMI, with easy data entry and clear showing of current BMI vs the lower and upper BMI limits for that weight class. So, it's easy to show, for example, how deeply you're in the "normal" or "obese" weight zones. But there's no tracking: it won't show if your BMI's rising or dropping, making it hard to evaluate if you're on the right track or not.