The Breach Alert feature of BillGuard app notified 97,582 users who were tied to the recent Home Depot card breach. The laundry list of other payment systems that have admitted being compromised only makes it more critical to stay on top of your credit card transactions and examine them with a fine toothed comb. BillGuard fits the bill as the best app I’ve tried that helps you easily track your financial transactions especially credit card transactions and spot a credit card crook.