I use Red Laser app. It isn't a quilting app but will save you money so you can buy more fabric. It scans the bar code of any product and then lists the price of the item within stores closest to you. I show the lowest price to the store I'm in and it is matched. If not, then I go to the store and buy it for the lower price. There are many apps like Red Laser, try them all and see which one works best in your area.