The Blog

A complete pre-launch checklist for Shopify flash sales covering inventory, purchase limits, discount setup, checkout validation, and post-sale review.

Cart limits reset after every order, which means determined buyers can purchase repeatedly. Lifetime limits track what each customer has bought across all their orders and block them once they hit the cap.

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.

You can block checkout on any Shopify plan when a cart breaks your rules: quantity caps, minimum order values, and lifetime purchase limits, all enforced through Shopify Functions via public apps. No Plus required.