If you are one of the 100 million americans trying to lose weight, you might consider "absolute fitness", a calorie counter / activity tracker application for iphone for $14.99. Bad idea.
Unlike advanced web services such as www.caloriecount.about.com (from the about.com website now owned by the NY Times), "Absolute Fitness" contains a very rudimentary database of foods, making it next to impossible to record your daily calorie intake. Simple foods like "sushi" are simply "not found". Similarily, unless your calorie burning activities are limited to walking and running, don't expect to find them here. To add insult to injury, the user interface is bad at best, and at times extremely confusing.
We're still looking for a good app in this category. If you find one please let us know.