UM Multistore Sync
Keeps inventory across several Shopify stores in step within seconds, and explains every number it sets.
- Real-time sync. A sale in one store lowers the inventory in all the others within seconds.
- Sync as a safety net. Whatever still drifts apart, a sync evens out by your rule.
- Activity log. Every number comes with the reason it is what it is.
You install the app from the Shopify App Store. After that, open it in your store's Shopify admin under “Apps”.