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Duplicate SKU Sync Master

Sync stock between products and variants having duplicate SKUs

by Thalia Tech · Launched: January 2021 · Free plan available.

3.0 (15) on Shopify
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App to sync stock between products & variants having same SKU. Sell duplicate SKUs without overselling!

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About Duplicate SKU Sync Master

Duplicate 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. Stock quantity remains common & in sync. Build bundles with SKUs that adjust stock with same SKUs.

Last verified: August 9, 2026 · Fresh

App details

Developer
Thalia Tech
Category
Orders & shipping
Pricing
Free plan available
Launched
January 2021
Rating
3.0 (15) on Shopify

Key features

  • For SHOPIFY STAFF Stores
  • For SHOPIFY PARTNER Stores
  • For SHOPIFY TRIAL Stores
  • For PAUSE AND BUILD Stores
  • All Features

4 plans · starts free · 7-day free trial

BASIC PLAN (FREE)

Free

BASIC PLAN

$5/month

ESTABLISHED PLAN

$12/month

HIGH VOLUME PLAN

$20/month

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 25 Shopify App Store reviews

Use the arrows to read individual reviews

This app solved a very tricky problem for me—automatic synchronization of the same SKU is truly amazing.
— Bayeas
This app is great! I sell personalized laser engraved tumblers in a much of different colors. Each color has its own SKU, and each SKU is used across a large number of product listings. This app lets me accurately control the inventory so I can keep track of how much product I have in stock. I tried several different inventory control apps before I settled on the one. The price is right an the su...
— Varina Goods Co
Simple lifesaving app. Makes managing duplicated sku products much easier. The best things about this app is product synchronisation, so if inventory of duplicated sku product changes, the app on other products with the same sku make changes too!
— enjoyandplay
Such a lifesaver!!! I had a small hiccup in getting it to work and they were amazingly helpful and responsive, very quickly. Now it works like a charm and is exactly what I needed for my listings to function perfectly.
— Guerrilla Charm
We had a feature request for the app to be able to export a CSV of all inventory to help us get an overview of our stock levels. The team got to work on it and added the feature for us with a quick turnaround. We're very thankful and glad to be working with Duplicate SKU.
— HeyDoodle
Works great! -Here are 87 more characters to reach the 100 character minimum for review submission.
— Role 4 Initiative
This has worked well for us in our case. We use this app to sync inventory between retail and wholesale products.
— Tula Hats
It syncs my products with the same SKU perfectly. I also like how I can edit my stock mannually per SKU code in the app, and don't have to edit the stock on 3 different places on the website. If you're looking for an app that syncs the stock of products with the same SKU code, I would defenitely recommend this app!
— Via di Gioia Swimwear
Brilliant app, we use it to make sure that embossed options and duplicate products (so that we can show different colours on the front end of the shop) keep up to date. We had a small issue with POS orders not syncing stock and they sorted it instantly! Thanks
— Hicks and Hides
I had been looking for an affordable option to do this. I was doing it manually but made a lot of mistakes, and it was taking so much time. I just try this app and I am so happy with how easy and fast it is. I will have to update most of my inventory to fix my previous mistakes but is a relief of how simple it is now. Thank you!
— The Meeps
It does exactly what it says: it syncs inventory levels between product listings based on SKU. We are a brick & mortar first store and we have agreements with some of our suppliers to maintain different pricing online vs. in-store. To do this, we create one listing for the Online Shop channel and another for the POS channel with the same SKU. When an item is sold in person, Duplicate SKU Sync work...
— American Way Goods
It's a good app, some occasional loading issues, would be great if it could store the SKU's so i don't have to type them in everytime when i need to update. Otherwise for where my business is at the moment, it suits my needs.
— eky creations
5/2025 UPDATE: Original issue was fixed from 2021, but now I have a new issue where the app is removing x2 the amount of items being sold. Example, I stocked an item at 15 pcs. 4 were sold. It synced the skus to have only 7 left in stock. I have to keep babysitting my sales again. As the other review from March 2025 mentioned, there is a high chance inventory hasn't been syncing properly for month...
— Codename: Weeb
i upgraded from the free plan and now i am having issues with inventory. products that have been out of stock for weeks magically have new inventory, resulting in oversold products. Its a pain, especially when dealing with TikTok Shop's cancellation policies
— Nailzotica
We recently discovered that some items have not synced properly for over five months, preventing us from selling these products. After reporting the issue, we were offered only $24 as compensation, despite having paid $120 during this period. As a result, we will now explore alternative solutions.
— Customhoj
App is messing up our inventory the past few weeks. They need to fix this app.
— Zapped Headwear
Hi, I m trying to add this app to my store it says server ERROR 500 Can you help me? it's a bit frustrating
— chargeFUZE Shop
Very pricy for the service. Not really satisfied. I will look for other solutions in the next future.
— Revelmy
Could have been a fantastic app, but the quantities are only adjusted when you sell an item. I needed all SKUs to be updated when 1 SKU's level changes (if it is sold or not) When will the next update be, that will fix this issue ?
— EMD Racing Online
I should have taken those reviews seriously, I usually like giving businesses a chance, but this app is doing exactly the opposite of what it is supposed to be doing. I am amazed, because its called Same SKU Sync, which means if 1 product has 3 same skue it will sync them together, this isnt doing this at all and when support responded to my issues they said "its because 3 products have the SAME S...
— RPM MOTORSPORT LTD.

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