I've seen several similar products and this is one of the best. I do have one major complain about the price structure.
▶ Monthly Subscription for $1.99 / Month
▶ Yearly Subscription for $9.99 / Year
These are both subscriptions and it doesn't make any sense. This app should have a one time fee. The creators don't actually have recurring costs.

Other than that I can say that this is the single most useful application of AR technology I've come across. When it comes to maps and directions, the phone/tab screen works just fine. But when going though books and lists finding what you need can be a serious pain and I love this Ctrl+F for real life idea. Very good Hunt!