Developer's DescriptionBy SolvojIMb Scanner is a free app that uses your phone/tablet camera to scan USPS Intelligent Mail Barcodes (IMb) on mail envelopes.IMb Scanner is a free app that uses your phone/tablet camera to scan USPS Intelligent Mail Barcodes (IMb) on mail envelopes.This app only reads IMb neither POSTNET, nor any other kind of barcode. For reference of what IMb is: https://en.wikipedia.org/wiki/Intelligent_Mail_barcode.Feel free to reach out to Solvoj LLC if you have doubts or find any issues. We would be glad to help you.