For Apple Wallet
On iPhone: Open the wallet app and tap the "+" sign. Fill out your details and you're ready to go.
For Apple Watch: Open the "Wallet & Apple Pay" and select "Add Credit or Debit Card".
On iPad: Go to Settings, open "Wallet & Apple Pay", and select "Add Credit or Debit Card"
On Macbook Pro with Touch ID: Go to System Preferences, select "Wallet & Apple Pay", then select "Add Card".
See below how to add your Archa card to your Digital Wallet (iOS) from within the Archa app:
For Google Wallet:
See below how to add your Archa card to your Digital Wallet (iOS) from within the Archa app: