A change in the store that owns the catalogue reaches the other store within seconds: stock, variants, fields and your own metafields. Images are copied when a product is first created there.Sync is easy on day one and quietly wrong on day ninety, so StoreTwin keeps checking: hourly for what changed, daily the whole catalogue, naming every difference by product and field.One plan, on the receiving store; source stores are always free. Orders and customers are never read.