Duplicup ‑ Duplicate SKU Sync vs PoolSync: Shared Inventory
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026 for Duplicup, Oct 13, 2026 for PoolSync.
The short answer
- Only Duplicup lists a free plan. Paid plans start at $13.99/month for Duplicup and $14.99/month for PoolSync.
- Duplicup lists 5 features PoolSync’s listing doesn’t mention, including Analytics, Auto-processing, Insights.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Starter
- · 1-Click Restock
- · Automatic SKU & Barcode Matching
- · Available for ALL Shopify plans
- · Standard Volume Processing
- · Up to 3 Duplicate SKU Groups
- · Up to 50 syncs / month
Growth
- · 1-Click Restock
- · Fast Email Support
- · Manual Link Groups (Bundles & Packs)
- · Multi-Location Support
- · Sync History
- · Unlimited Store Catalog Size
Pro
- · 1-Click Restock
- · For growing businesses
- · Manual Link Groups (Bundles & Packs)
- · Multi-Location Support
- · Priority Support
- · Sync History
Enterprise
- · High Concurrency Sync
- · Manual Link Groups (Bundles & Packs)
- · Multi-Location Support
- · Priority Engineering Access
- · Sync History
- · Unlimited Duplicate SKU Groups
PoolSync Pro
- · Activity logging & audit trail
- · Hourly reconciliation
- · Multi-location support
- · Pool health dashboard
- · Real-time webhook sync
- · Safety buffer & low-stock alerts
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureDuplicup 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 to keep connected inventory in sync across matching SKUs in real-time.
Shopify treats each variant as independent inventory. When variants share stock, you risk overselling and spend hours adjusting quantities manually. PoolSync creates inventory pools that sync to all linked variants automatically. Set consumption multipliers for different sizes (1oz = 1 unit, 4oz = 4 units). Orders deduct from the pool and update every variant. Refunds restore automatically.
- Sync inventory in real-time for products and variants sharing an SKU.
- Sell an item through multiple product pages and track simple bundles.
- Multi-location SKU sync. Match stock levels at all your locations.
- Quick restock. Update stock of all the same SKUs together with one click.
- Inventory pools with consumption multipliers for variants of different sizes
- Pool health dashboard showing sync status, quantities, and warnings at a glance
- Hourly reconciliation detects discrepancies and lets you fix them in one click
- Safety buffer reserves stock to prevent overselling during checkout delays
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Duplicup |  PoolSync |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Duplicup | PoolSync |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 5 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
Duplicup and PoolSync: common questions
- Is Duplicup or PoolSync cheaper?
- Only Duplicup lists a free plan. Paid plans start at $13.99/month for Duplicup and $14.99/month for PoolSync. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Duplicup lists 5 the others don’t mention, such as Analytics, Auto-processing, Insights, Real-time updates. PoolSync lists 4 the others don’t mention, such as Inventory planning, Inventory tracking, Low stock alerts, Out of stock notifications. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 8, 2026 for Duplicup, Oct 13, 2026 for PoolSync; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 8, 2026 for Duplicup, Oct 13, 2026 for PoolSync. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.