[kdevrou]

I like the idea but my biggest problem isn't ingredients, it's eating out. Having this available on my phone when looking for a place to eat would be a real time saver.

[ecesena]

You can save it on your home screen and... voilà :) We spent quite some time making it usable on mobile too.

If you really really want an app, you can get the code http://github.com/hasgluten/hasgluten and plug it in Cordova/PhoneGap.