Iphone App for tracking places to try
I use Google Maps and add a location whenever I hear of a place I'd like to try. It won't alert me when I am near them -- if by "alert" you mean send a text or notification. But when I am hungry and away from my own neighborhood I pull up Google Maps, turn on the "Restaurants to Try" layer, and see what is nearby.
I have a Google Android phone, though, so it may not work the same on an iPhone.