Best Apps to Push Down Out-of-Stock Products in Shopify (6 Compared, 2026)

Six apps dominate the "push down out of stock" search on the Shopify App Store: Sink, StockIQ, MB Push Down Hide Out of Stock, PushLast, Pushy, and EM Product & Collection Sort. They all demote sold-out products; they differ sharply on pricing model (product-capped vs. collection-capped), what else they bundle, update frequency, and polish. This comparison lays those differences out with live App Store data.

The six apps at a glance

App	Rating	Built for Shopify	Free plan	Paid from	Plans capped by
Sink — Push Down Out of Stock (Xeon Apps, 2025)	5.0★ · 30	Yes	5 collections, unlimited products	$2.99/mo	Collections only
StockIQ — Out-of-Stock Manager (EGNITION, 2017)	4.9★ · 118	Yes	49 products / 99 collections	$5.99/mo	Products
MB Push Down Hide Out of Stock (merchbees, 2020)	4.8★ · 137	Yes	50 products / 100 collections	$4.99/mo	Products
Out of Stock Sold Out PushLast (Awesome Apps, 2020)	4.9★ · 18	No	None (14-day trial)	$3.99/mo (1,000 products)	Products
Pushy — Out Of Stock Push Down (Bortor Studio, 2024)	5.0★ · 10	Yes	5 collections	$3.99/mo	Collections
EM Product & Collection Sort (EM Softech, 2024)	No reviews yet	No	1 collection, manual sync	$5.99/mo	Collections + sync frequency

The split that actually decides it: what do the plans cap?

Push-down apps price one of two ways, and the difference compounds as your store grows.

• Product-capped (StockIQ, MB, PushLast): tiers are set by how many products your store has. StockIQ's free tier covers 49 products; MB's covers 50; PushLast has no free tier and prices per thousand products. A 5,000-product store lands on $8.99–$11.99/mo before considering features.
• Collection-capped (Sink, Pushy, EM): tiers are set by how many collections the app manages, with products unlimited. A 50,000-product store with 20 managed collections pays Sink $2.99/mo.

Neither model is universally cheaper — a tiny catalogue with 200 collections favours product-capping — but for the common case of a growing catalogue and a stable set of key collections, collection-capping wins, and Sink's 11,000-products-per-collection ceiling is the highest sorting capacity in the group.

What's each app's story?

Sink — Push Down Out of Stock (that's us)

Focused purely on the demote-and-sort job: enable per collection, pick a rule (Best selling, Title, Price, Newest, Oldest, Manual, or Most relevant), and sold-out products sink to the bottom in real time — typically within a couple of minutes — climbing back automatically on restock. Three sold-out definitions for multi-location stores, exclusions for backorderable and tagged products, no theme code. Unlimited products on every plan including free; only collections are counted. 5.0★ across 30 reviews, Built for Shopify.

StockIQ — Out-of-Stock Manager

The veteran (2017) and the broadest bundle: push-down or hiding per collection, back-in-stock notifications, and low-stock alerts in one app. Well reviewed (4.9★ · 118) and Built for Shopify. The trade-off is the product-capped pricing — 49 products free, 9,999 at $16.99 — which makes it the priciest route for large catalogues that only need sorting.

MB Push Down Hide Out of Stock

The review-count leader (4.8★ · 137) and, like StockIQ, a two-in-one: push down or hide, plus 404-redirects for hidden product pages — a thoughtful SEO touch if you hide. Product-capped (50 free, 10,000 at $13.99) with 3-day trials. If you want push-down and hiding from one app and your catalogue is modest, it's a strong pick; our take on when each treatment applies is in push down vs. hide.

Out of Stock Sold Out PushLast

A focused push-down tool with restock repositioning, priced purely per product count ($3.99 per 1,000 up to $19.99 per 100,000). No free plan and no Built for Shopify badge, and the smallest review base of the established apps (18) — but the per-product ladder can suit mid-size catalogues that dislike collection counting.

Pushy — Out Of Stock Push Down

The closest model to Sink: collection-capped, free for 5 collections, Built for Shopify, with real-time updates plus an hourly safety re-check. Young (2024) with a small but perfect review base (5.0★ · 10). Its paid ladder runs slightly higher than Sink's at the entry ($3.99 vs. $2.99 for 25 collections) and tops out at 5,000 collections rather than unlimited.

EM Product & Collection Sort

The budget outlier — and the cautionary tale about update frequency. Its plans differ not just by collection count but by sync schedule: weekly on Basic, bi-weekly on Advanced, daily on Super. A weekly re-sort means a Monday sellout can sit at the top of your collection until the following Monday. No reviews yet; we'd wait for a track record.

Which should you pick?

• Large or growing catalogue, want sorting done right: Sink — unlimited products on every plan is the differentiator, and it's the cheapest paid entry in the group.
• Want push-down + hiding + restock alerts in one app: StockIQ or MB, accepting the product caps as the price of the bundle.
• Prefer per-product pricing without collection counting: PushLast.
• Whatever you choose: confirm it updates in real time, confirm restocked products move back up automatically, and check what the free plan actually covers — those three questions separate the tools that keep collections truthful from the ones that re-sort them occasionally.