Top iPhone fitness apps (screenshots)

1. Lose It

Cost: Free

Pros: Won't cost you a dime; provides a simple way to track calories ingested in the form of food and expended in the form of exercise; has a fairly extensive library of standard and brand-name foods with accurate calorie, carb, fiber, fat, and protein values, all of which are trackable within the app; lets you set weight-loss goals and track over time.

Cons: Calorie budget and burn amounts per exercise aren't necessarily accurate for all users, as the program doesn't let you input your activity level or body fat percentage; certain foods have limited input amounts (for example, only cups when you might like to enter weight in grams instead); inputting data can become tedious over time.

Good for: Diligent record keepers who are serious about losing weight, or anyone who wants to gauge his or her overall calorie/carb/fat/protein/fiber consumption for reference in health and weight loss.