TheFind uses your GPS to find where you are and it displays the stores that are closest to you that has the product you want. However, the list isn't sorted from closest to farthest. That may have been a good feature.
But, the app does have a map so you can graphically see which stores are nearest.
You can also check out prices on the web to see how they compare with the store prices.
If you want a no-nonsense app for your shopping, TheFind is great. Although you don't get some of the features like Slifter, you also don't have to give up your telephone number.
You can get TheFind for free in the App Store.
And while you're doing that, you can enjoy a fan video of my favorite song about shopping called "Shopping" by the Barenaked Ladies: