Its very helpful but...

The database is not monitored or controlled by the company so ANYONE can add their business to it and say they offer Gluten Free food/items but many listed are not safe for Celiacs (due to contamination issues) in my opinion. I have found the app very helpful when traveling but in any case, you still need to be vigilant about where/how your food is prepared.
I have sent in negative feedback for places that gave me food that clearly had gluten in it. The app is a good tool but Diners BEWARE.

JJinPA3 about Gluten Free Registry