01
Detect the stockout
Show the form when the selected variant cannot be bought.
Products
Published on the Shopify App Store Shopify back in stock app
Turn sold-out demand into a ranked restock plan.
Capture sold-out variant waitlists, rank demand, and send restock alerts when inventory returns.
Klyna Back-in-Stock
Restock alert app
Variant
Capture level
Ranked
Demand report
Alerts
Short answer for merchants
Built for the exact query: Shopify back in stock app.
Klyna Back-in-Stock is a Shopify restock alert app for variant waitlists, demand ranking, CSV exports, resend controls, and automatic email alerts when inventory is sellable again.
Shopify restock alerts notify me when back in stock Shopify variant waitlist app
Issue-to-action workflow
Each Klyna app is positioned around one merchant job: find evidence, decide safely, and act with fewer surprises.
02
Capture intent
Store the requested variant, email, timestamp, and source context.
03
Trigger on sellable inventory
Alert when inventory returns in a way customers can act on.
04
Measure demand
Use waiters, sent alerts, visits, and orders as separate signals.
Variant-aware waitlists
Capture interest for the exact sold-out size, color, or configuration shoppers requested.
Demand ranking
Group waiters by product and variant so replenishment planning has a clearer signal.
Restock alerts
Send shoppers back to the product when inventory is available again.
Exports and controls
Filter, re-arm, export, and review subscriber lists instead of leaving waitlist data buried.
Why this matters
The value is not another dashboard. It is a shorter path from store risk to a reviewable action.
Live Shopify listing metadata describes waitlists, demand ranking, and automatic restock alerts.
Klyna blog content already targets restock alert app selection, conversion paths, and event tracking.
The workflow avoids claiming guaranteed recovery from waitlist volume alone.
Benefit map
A store often sells out specific sizes, colors, or packs.
A buying team needs a signal before reordering inventory.
A merchant wants a store-owned waitlist rather than only platform-side saved-product alerts.
A team wants exportable evidence of missed demand.
Positioning
Free plan available on Shopify; paid plan details should be checked on the live listing.
Versus product-level notify forms
Variant-level capture gives cleaner demand data and reduces irrelevant alerts.
Versus accepting backorders
A waitlist measures interest without taking orders the store cannot yet fulfill.
Operating limits
A waitlist measures interest, not guaranteed purchases.
Deliverability, consent language, and resend controls affect alert quality.
Inventory setup must be accurate for useful triggers.
FAQ
Direct answers for merchants comparing Shopify apps before install.
Should restock capture be product-level or variant-level?
Variant-level capture is usually stronger because shoppers often want a specific size, color, or configuration.
When should a restock alert send?
Send when the requested variant has sellable inventory and the customer can reasonably complete the purchase.
Does a waitlist predict purchases?
It predicts interest. Compare waiters, alert delivery, clicks, purchases, and unsubscribes before using it for buying decisions.