Duplicup ‑ Duplicate SKU Sync

Sync duplicate products & variants with the same SKU. Sell duplicates without overselling!

Duplicup helps you optimize your store by safely offering duplicate products and variants under multiple listings. Whether you are selling identical items on separate pages, improving SEO, or managing different prices for POS, simply give them the same SKU. Our app creates a shared inventory pool and syncs inventory across matching SKUs in real-time. No more manual stock updates or overselling, allowing you to confidently expand your product catalog.

Install on Shopify App Store

What you get with Duplicup

  • Real-Time SKU Sync: Sync shared inventory in real-time. Automatically link matching SKUs or manually link variants together.
  • Multiple Product Pages & Bundles: Sell an item through multiple product pages and track simple bundles safely without overselling.
  • Multi-Location SKU Sync: Match stock levels at all your locations automatically to keep inventory accurate and synchronized everywhere.
  • 1-Click Quick Restock: Update stock of all the same SKUs together with one click. No manual inventory tracking needed.
  • Manual & Automatic Linking: Manually link any variants together even if they have different SKUs. Maintain full control over your sync groups.
  • Easy to Use & Instant Sync: Activate sync with a click of a button. No complicated setup, works seamlessly directly in Shopify Admin.

Duplicup Visual Interface & Storefront Sync

Shopify duplicate product listings sharing a real-time synchronized inventory pool with Duplicup
Shared Inventory Across Multiple Storefront Pages
Duplicup live inventory sync dashboard for Shopify stores
Central Inventory Sync Dashboard
Duplicup matched SKUs directory showing linked variants and stock quantities in Shopify Admin
Matched SKUs Directory & 1-Click Sync
Multi-location Shopify inventory synchronization across warehouses and retail stores
Multi-Location SKU Synchronization

How Duplicup Works in 3 Steps

  1. Step 1: Match or Link Your SKUs. Give identical SKUs to duplicate products or variants across different listings. Duplicup automatically discovers matching SKUs across your catalog, or you can manually group any variants together.
  2. Step 2: Real-Time Inventory Synchronization. When an order is placed, inventory is refunded, or stock levels are adjusted manually, Duplicup instantly updates all linked listings at that location in seconds.
  3. Step 3: Sell Freely Without Overselling. Confidently scale your store with dedicated SEO landing pages, unique POS prices, and bundles without ever overselling or doing manual stock math.

Shopify Store Use Cases

  • Dedicated SEO Landing Pages: Create multiple product pages targeting different search terms for the same physical product while sharing stock.
  • Different Prices for POS vs. Online: Set separate pricing, titles, or descriptions for in-person POS sales and online storefronts while drawing from the same warehouse stock.
  • Simple Bundles & Multipacks: Sell 2-packs, 3-packs, or kits on their own product pages without worrying about split inventory across variants.
  • Ad Campaign Specific Pages: Build tailored landing pages for specific TikTok, Facebook, or Google ad campaigns to boost conversion rates safely.

Transparent Pricing Plans

  • Starter Plan (Free): Available for all Shopify plans, all core synchronization features, unlimited real-time sync events, 1-Click Inventory Alignment, email support.
  • Growth Plan ($9.99/month, 7-day free trial): Full multi-location support, unlimited real-time syncs, 1-Click Catalog Restock, comprehensive sync history logs.
  • Pro Plan ($19.99/month, 7-day free trial): For scaling brands, full multi-location & POS support, priority support.
  • Business Plan ($39.99/month, 7-day free trial): High volume catalog processing, unlimited SKUs & sync events, VIP priority support.

Verified Shopify Merchant Reviews

“We looked all over for a solution and finally found this. The engineering team was always on top of it and went above and beyond to make sure Duplicup worked perfectly with our store. Highly, highly recommend.”

— CRUSHS (United States, 5/5 Stars)

“I’ve tried several other apps for managing shared inventory across variants and locations, and none of them quite delivered. This one finally does. Everything stays perfectly in sync.”

— Stash Shop (United Kingdom, 5/5 Stars)

“We needed a slight tweak to an existing feature and the devs had the feature added within a few days. No other SKU sync tool lets you manually link product skus. This is a game changer.”

— Security & Privacy Tools | STS Collective (United States, 5/5 Stars)

Frequently Asked Questions

How does Duplicup sync inventory?
Duplicup creates a shared inventory pool for products and variants with matching SKUs. When stock changes for one product (via order, refund, or adjustment), all linked products are updated in real-time.
Why should I sell duplicate products on separate pages?
Selling duplicate listings lets you target different SEO search terms, run specific ad campaigns, create distinct product presentations, or manage different prices for POS—all while safely sharing one inventory pool without overselling.
Do products need to have the exact same SKU?
Not necessarily. Duplicup automatically syncs products that share identical SKUs, but you can also manually link any variants together regardless of their SKUs.
Does Duplicup work across multiple Shopify locations?
Yes. Duplicup provides comprehensive multi-location SKU sync, keeping stock levels consistent and matched across all your Shopify locations.
Can I track simple bundles?
Yes. Duplicup supports simple bundle tracking so that when a bundle or multipack sells, the individual component SKUs are decremented automatically.
How does 1-Click Restock work?
Updating the inventory quantity for one SKU updates all matching SKUs across every listing together in a single click.

Related Guides & Documentation