Currently, Apple Wallet only supports a few barcode types: QR, Aztec, PDF417 and recently also Code 128 with iOS 9 or later. You can add all your rewards cards in Stocard with barcodes of these formats to Apple Wallet by clicking on the "Share Card" button at the bottom of the card display screen (below the barcode) and choose "Add to Apple Wallet". Since Stocard supports more barcode types, there might be cards in Stocard that you cannot add to Apple Wallet though.
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