Orumio — Discount Rescue

Requires Shopify Plus: Shopify runs an app block inside checkout on Plus only. A discount code refused at checkout is a leak — the shopper leaves. The app detects that failure and, inside the limits you set, offers one single-use alternative under the same field in about a second. You set a percentage or a fixed amount, a minimum cart subtotal, and a cap that refuses a rescue rather than shrinking it. It never stacks: no offer when a discount is already there, and a checkout gets one rescue.