Nudgeback adds a Notify me form to your product page. It appears only when the option a shopper picked is sold out, never on items you keep selling at zero stock. When stock returns, each waiting shopper gets one email with a link straight to that option. Stock is counted only at active locations that ship online orders, so stock that lands at a shop counter emails nobody. Moving from another app? Import your waiting list by CSV without emailing anyone, and export it again any time.

• Notify me form shows only on sold-out options and uses your theme's fonts
• One email per shopper when stock returns, linking straight to that option
• Ignores stock at locations that don't fulfill online orders
• Import a waiting list from another app by CSV, without emailing anyone
• Export your whole waiting list as CSV any time, including if you leave