I have tried to find a iPhone app to calculate Weight Watchers Pro Points for a while. I have the WW calculator that comes with the kit, but it is very limited in capability.
Recently I did some searching, and discovered that iWatchr will do the job. At the time of this post, iWatchr sells for $0.99, plus you can upgrade for a further $0.99 and get extended capabilities.
I really like this app. It is fully featured, allows you to save our favourite foods and reuse them as needed.
If you are looking for an iPhone Weight Watchers App for Pro Points, this is the App for you.
Edit: 2014. This app is no longer available for download. If you have it already, don’t delete it, because it is not available for re-download