Each app does one job well. Installed together on the same store they share the catalog, link to each other and stay in step.

Quantity Linker
Keep related listings' quantities in step, stop overselling
Group a 1-pack, a 5-pack and a 10-pack of the same item, tell the app the unit quantity of each, and after every order it recalculates what each listing can still sell. Link bundle listings to their components the same way.
- Shared-stock groups that rebalance after every sale, refund and manual change
- Unit quantities for packs and multipacks
- Bundle inventory linking, including mix & match pools
- New variants join their group automatically
- Integration in the Shopify admin order page
Free: 20 linked listings in 5 shared-stock groups. Paid plans from $14.99 a month.

Reorderfy
Turn supplier orders into restocks and purchase history
Paste the order page text, drop in a screenshot or import an order file. Reorderfy extracts the items, matches each line to your SKUs, receives the stock and records the purchase against every SKU and supplier.
- Extraction from pasted text, screenshots or CSV / Excel files (AliExpress and Temu recognised)
- Restock by line with received quantities, costs and dates
- Purchase history per SKU and per supplier
- Sales column: units sold and price history per variant
- Product and variant blocks in the Shopify admin
Free: 3 supplier orders a month. Paid plans from $9.99 a month.

Product Multiplier
Create products and variants in bulk from a SKU plan
Describe how your SKUs are built once (prefix, size, colour, pack size…), let the guided builder check it against your catalog, and generate every product and variant row with titles, options, prices, images and metafields. Then create them in Shopify in one go.
- Guided SKU builder that reads your existing SKUs
- Bulk product and variant creation with images and metafields
- Fixed, multipack and mix & match bundle listings
- Bundle recommendations drawn from what sells together
- Supplier order extract to prefill the items you are creating
Free: 15 listings created a month. Paid plans from $12.99 a month.