https://forum.tudiabetes.org/topics/iphone-diabetes-applications
Hi Fred,
This has been discussed a few times before, I can't speak for iphone users, as I am an android/linux geek ha..
Carbs and Cals is a good app for carb counting when out and about and is available on both platforms.
Worth getting a few decent books as well if you are new to diabetes.. Not sure if you are Type 1 or Type 2, but I still think they would be worth reading if you are Type 2.
http://www.amazon.co.uk/Think-Like-Pancreas-Practical-Managing/dp/1569244367
I have also taken alot of great information from this site and other diabetics..