Sync Logic is the first and most experienced Shopify store-to-store adjusting application. We have performed billions of sync tasks since launch. Real-time product syncing: All of your store’s items and stock are constantly updated. It takes only seconds for an improvement or deals to spread to your kid stores. Modify Key Fields on the Fly: Is your cost on your child’s store 80% of the cost of your parent’s store? Create a value change to do the transformation for you.