Same item, two listings, two stock counts that drift apart. Link them and Douplo keeps their stock matched, even across products. Douplo finds matches by SKU and barcode; you decide. Before a link starts you see each variant's stock before and after, at each location it covers, and nothing starts until you confirm. A new link can be undone for 2 minutes if stock has not moved. Every link that is on is checked daily, and Douplo touches inventory only. Low-stock alerts show in the app.

• Link the same item within one product or across different products
• Douplo finds matches by SKU and barcode. Nothing is linked until you say so
• See every variant's stock before and after. Nothing starts until you confirm
• Undo a new link within 2 minutes if stock hasn't moved. Matched by location
• Daily check, up to 90 days of history and low-stock alerts