Worth the learning curve!
I set this up to run on my 2 mac computers and iTouch. Initially I had quite a bit of trouble and ended up having to reinstall it on both computers. However, the support given was very thorough and Im VERY happy with how it all works now. Ive tried other calorie counting apps but have been frustrated by their lack of flexibility or their lack of metric support. I live outside of North America so often eat foods that are not on the database. This app allows me to easily enter new foods (even if I dont have the nutrient breakdown), to combine ingredients/meals, and to copy and edit existing foods. There is a bit of a learning curve involved but its worth it! (Very thorough users manual as well.)
Nonbirira about Calories 3, v3.0