We reviewed the most-installed back-in-stock apps on Shopify to help you pick one that actually works. Ratings, pricing, notification channels, and honest pros and cons for each.
Shopify's restock webhook only fires when total inventory crosses zero, so alerts can blast phantom notifications or stay silent after a real restock. Here is the difference between edge-triggered webhooks and level-triggered polling, and how to diagnose a waitlist that never hears back.
Since July 2026, negative stock at a non-shippable Shopify location counts against online availability. Shoppers can add to cart, then hit a checkout error. Here is the inventory math and how to fix it.
A Shopify Community thread asking for restock alerts that watch a single warehouse has been open since 2021 with no working answer. This guide explains why most apps cannot do it, what a correct per-location trigger has to get right, and how to set it up with campaigns in Dash Checkout.
Sold out products are lost sales waiting to happen. Back-in-stock alerts capture customer demand while inventory is gone, then automatically convert that demand when stock returns.