About this app
Barcode apps generate and print, but none prove a label scans as the product it belongs to. Mastiff scan-checks the exact PDF before you print it and shows the decoded value beside the one you meant. Each UPC, EAN-13, and Code 128 gets a valid check digit and is unique across your catalog. Presets for Dymo, Brother, Zebra, and Avery print at the exact size you chose, with a calibration page. Previews, test prints, and reprints never count as printed labels. Email support, answered the same day.