Swiggle automatically saves you money on your online purchases when prices drop after you buy — and it works at over 50 retailers across the U.S. and Canada including Amazon, Walmart, GAP, Target, Macy’s, Best Buy, Victoria’s Secret and dozens of others. It’s a ‘set and forget’ service, which means that once you’ve linked the emails where you normally get your online purchase receipts, Swiggle does the rest.