The BrewGuru App is great for a 1.0 app. I've found an interesting bug, but haven't found a place to report it, so hopefully, the devs read this forum!
I am a regular at Heretic BC in Fairfield, CA. The Brew Guru app notifies me 5 minutes after I LEAVE Heretic that "You are near Heretic Brewing Company" and that there are AHA discounts there. Luckily, they all know me and I get my AHA discount anyway, but it's funny that it does not recognize that I am actually AT the brewery while I am there. I don't think it is the GPS on my iPhone because it is accurate in all the other apps.
Keep working on it! Great start!