A single returned unit can email your entire waitlist. How minimum quantity thresholds and level-triggered stock checks stop false restock alerts on Shopify.
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.
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.