StackSure

StackSure is a mobile + browser-extension app that verifies coupon and promo code success rates in real time, before you checkout. Instead of dumping hundreds of dead codes, it shows a short list of codes ranked by probability of working for your exact cart (store, items, subtotal, new/returning customer, shipping method). Users can optionally share anonymized outcomes (worked/failed + discount amount) to keep the database fresh. The app also flags common failure reasons (excluded brands, minimum spend, first-order only, app-only) and suggests the fastest fix (e.g., add filler item, switch to email signup code, try free-shipping threshold). It’s not magic: many stores intentionally block stacking and rotate codes quickly. The value is saving time and reducing checkout frustration with evidence-based recommendations rather than spammy lists.