Duplicate SKU Sync Master vs StockTwin
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026.
The short answer
- Only StockTwin lists a free plan. Paid plans start at $5/month for Duplicate SKU Sync Master and $9.99/month for StockTwin.
- StockTwin lists 13 features Duplicate SKU Sync Master’s listing doesn’t mention, including Analytics, Automatic, Barcodes.
Head to head
Sync stock between products and variants having same SKU
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
BASIC PLAN (FREE)
- · All Features
- · For PAUSE AND BUILD Stores
- · For SHOPIFY PARTNER Stores
- · For SHOPIFY STAFF Stores
- · For SHOPIFY TRIAL Stores
- · Unlimited SKUs
BASIC PLAN
- · 1-Click Restock
- · For SHOPIFY BASIC stores
- · Multi-location Support
- · Sync History
- · Unlimited SKUs
- · Unlimited Updates
ESTABLISHED PLAN
- · 1-Click Restock
- · For SHOPIFY & ADVANCED SHOPIFY stores
- · Multi-location Support
- · Sync History
- · Unlimited SKUs
- · Unlimited Updates
HIGH VOLUME PLAN
- · 1-Click Restock
- · For SHOPIFY PLUS stores
- · Multi-location Support
- · Sync History
- · Unlimited SKUs
- · Unlimited Updates
Free
- · Limited sync (orders & refunds)
- · Manual SKU discovery
- · Manual sync
- · Up to 5 SKU groups
Pro
- · Auto-reconcile
- · Barcode sync
- · CSV export
- · Full sync mode
- · Low stock alerts
- · Safety stock
Business
- · All Pro features included
- · Bundles & kits
- · CSV import & export
- · Exclusion rules
- · Sync rules
- · Unlimited SKU groups
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureDuplicate SKUs help to diversify catalog, improve SEO & marketing, create bundles & manage multichannel selling. If item stock changes, this app will sync the inventory level across all duplicate SKUs in near real-time. You dont have to worry about overselling or manually updating inventory for each duplicate SKU. Sell same SKUs online & on POS. Sync POS SKUs inventory with different pricing.
Selling the same product under multiple listings, photos, or collections? StockTwin links every variant that shares a SKU or barcode and keeps their inventory perfectly in sync across all your locations, in real time. When one sells, the rest update instantly, so you never oversell or show wrong stock counts again.
- Easy to use. Activate sync with a click of a button. No complicated setup.
- Build for scale. Sync unlimited duplicate SKUs and any number of orders.
- Multi-location SKU Sync. Match stock levels at all the locations.
- Analyze. Get a snapshot of duplicate SKUs and surface mismatched stock levels.
- Sync stock across duplicate SKUs and barcodes in real time
- Sell bundles and kits without overselling their components
- Reserve safety stock for wholesale and off-channel sales
- Bulk sync hundreds of SKUs, import/export setup as CSV
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 |  Duplicate SKU Sync Master |  StockTwin |
|---|---|---|
| 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 | Duplicate SKU Sync Master | StockTwin |
|---|---|---|
| App Store rating | 3.3 ★ | Not published |
| App Store reviews | 16 | Not published |
| New reviews, 28 days | 0 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Duplicate SKU Sync Master | StockTwin |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $5/month(ahead) | $9.99/month |
| Longest free trial | 7 days | 7 days |
| Plans listed | 4 | 3 |
Listing
| Measure | Duplicate SKU Sync Master | StockTwin |
|---|---|---|
| Shopify category rank | #232 | #156(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jan 6, 2021 | Jun 3, 2026 |
| Languages | 1 | 1 |
| Developer | Thalia Tech | Craft Lab |
FAQ
Duplicate SKU Sync Master and StockTwin: common questions
- Is Duplicate SKU Sync Master or StockTwin cheaper?
- Only StockTwin lists a free plan. Paid plans start at $5/month for Duplicate SKU Sync Master and $9.99/month for StockTwin. 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?
- StockTwin lists 13 the others don’t mention, such as Analytics, Automatic, Barcodes, Data import and export. 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 Oct 13, 2026; 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 Oct 13, 2026. 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.