https://www.prweb.com/releases/passkit_launches_loopy_loyalty_the_complete_digital_stamp_card_solution/prweb12356382.htm
Hong Kong, Hong Kong (PRWEB) December 02, 2014 -- PassKit has introduced Loopy Loyalty, the latest digital stamp card solution with an online stamp card...
digital stamp cardpasskitlaunchesloopyloyalty
https://pub.dev/packages/apple_passkit
Plugin to deal with Apple Wallet & PKPass files on iOS. You can check for availabililty and add them.
applepasskitflutterpackage