Many grocery stores use label printing scales. Shoppers can weigh an item away from the POS and print a specialized label. These labels are often called "weight embedded", because the weighted value is embedded in the barcode.

The Loyverse POS app, starting from version 2.33 for iOS, supports scanning barcodes with the item SKU and its weight. When scanning such a barcode, the item is automatically added to the receipt with the indicated weight. The system allows the use of weighted barcodes in the following formats: EAN 13 and UPC-A.

To use this feature, log in to your Back Office, click on the Settings icon on the left menu bar to go to the System settings. 
In the ‘Features’ section, switch on the parameter for ‘Barcodes with embedded weight’.  Click the ‘Save’ button.

Updates: The Loyverse POS app, starting from version 2.19.1 for Android, also supports scanning barcodes with embedded weight.

For more details check help article: How to Scan Barcodes with Embedded Weight