Gas Buddy— It's helpful to look up where the cheapest gas is close to you (especially nice when traveling), but we've found the price hike alerts even more helpful in saving money. We can fill up before the prices spike.
2. Cartwheel by Target— This app allows you to select mobile coupons, stack them with paper coupons and save on what you buy at Target (it even shows you coupons specifically to use with things that are already on sale!).
3. Craft Store Apps— Jo-Ann, Michael's and Hobby Lobby apps allow you to access you coupons while you're standing in line. No more getting to the store and realizing you forgot your flier or coupons. 40% off, at your fingertips. And you can use coupons at competitor stores. (Note that the Michael's app requires you to register first.)
4. Shopkick— Shopkick rewards you with points for walking into different stores, and the points can be redeemed for gift cards. Additional points can be earned for scanning barcodes of specific items in store. That part is like a scavenger hunt for adults!
5. Redlaser— This app will tell you the best price on an item (either online or in a brick and mortar store) when you scan a product bar code, and can give you heads up on available coupons.