🏹 How does Inventory sync work

In this Article

How does Sumtracker sync your data?


  • Orders are synced from store to Sumtracker - every 10 minutes.
  • Sumtracker will sync orders from the time you connect your store and turn on inventory sync. If inventory sync is turned off sumtracker will not sync orders data.


  • Inventory data is synced from Sumtracker to store - every 9 minutes
  • Inventory data is synced from Sumtracker to store only. Any changes to inventory should be done within Sumtracker. For sumtracker to start syncing inventory you have to turn on inventory sync.
  • If you make any inventory adjustment in Sumtracker, it is queued up for inventory sync immediately. 


  • Products data is synced from the store to Sumtracker even if inventory sync is turned off. But the store has to be connected.
  • Only the products which have SKU are copied to Sumtracker. Having an SKU on the products is mandatory.

Please note: Sumtracker is the master data of your inventory. You have to do all your stock adjustments in Sumtracker.

If you do any manual stock adjustments on the online store admin dashboard, they will not be detected by Sumtracker. Any changes to the inventory must be done within Sumtracker. When you change the inventory of a product in Sumtracker it will be pushed to all your connected stores.

Sumtracker does not push any information other than the inventory levels to your store.

Adding new products

You have to add the new products to your online store.

  • For Shopify, WooCommerce and BigCommerce: products and their changes are synced from Store to Sumtracker in real time.
  • For Etsy, eBay and Amazon: products and their changes are synced every 12 hours. To sync them immediately, you can click on Refresh button under Store List on Dashboard

Once the new product is synced to Sumtracker, you have to add its inventory in Sumtracker. Sumtracker will update the inventory to your store.

How is inventory updated when you adjust the inventory of a SKU in Sumtracker?

When you change the inventory of a product in Sumtracker it gets updated on all your connected Stores. But please note that Sumtracker will not detect any changes you have done directly on the store admin panel.

For example, you have a product which is available on 3 stores Shopify, Etsy and Amazon. When you change the inventory in Sumtracker from 10 to 15, the inventory on all 3 stores will become 15.

The Available Inventory is updated on your store. 

Available Inventory = In Stock - Booked Stock

As shown in screenshot below, the Available quantity = 152 gets updated for the SKU. 

In Stock = Physical stock in your warehouse

Booked = Quantity committed in open orders, not yet shipped

Available = Available inventory that can be purchased by your customers

Incoming = Total Incoming stock through Purchase Orders

How is inventory updated when you receive an order on the online store?

Say you are selling Apples and you have 50 apples in your warehouse. You get an order for 4 apples. Now sumtracker will book 4 apples and update 46 as the sellable stock to your store. Before order fulfilment: In Stock = 50, booked = 4, available = 46 Since you have not yet fulfilled the order your physical stock is still 50. But 50 - 4 = 46 which is the available stock sumtracker will use to update on the stores. Now when you fulfil this order, the physical stock becomes 46 and the booked stock becomes 0. Which means sumtracker will still update 46 as the stock to your store.

After order fulfilment: In Stock = 46, booked = 0, available = 46

This is done so that when you count your physical stock it will match with the in stock figure in Sumtracker at all times.

How is inventory updated for duplicate SKUs?

If multiple listings have the same SKU, they get connected to the same product in Sumtracker. In the above screenshot, the product has 2 Online Listings (check last column in screenshot). 

Inventory for both listings is updated through the same product in Sumtracker.

How to sync inventory manually from the dashboard?

Sumtracker syncs inventory to all your stores every 10 minutes. This done automatically. To check the last time inventory sync was done, you can see it on your dashboard.

You can also refresh the Orders, Inventory or Listings from the Refresh button on Dashboard at any time. 

This can be needed if,

  • you are testing something 
  • created a new listing on Etsy, eBay or Amazon and want it to sync immediately
  • found some details are not matching between Sumtracker and your Store.

This action will sync your listings and orders from Store to Sumtracker. And any inventory changes will sync from Sumtracker to your Store.