A great shopping aid. It seems to find lower prices for most of the things I am looking for. It is brand specific, if you are looking for bigredbricks company products, the comparison prices are for identical bigredbricks products, not tinygreenmolds products. What it finds is always relevant. You may chose to go to the alternate suggested site(s) or stay where you are. I have had no problems with the InvisibleHand app. I don't always take their advice, but when I do it's an easy go.