Can I add my One-time card to Google Pay or Apple Pay?

Yes, you can!
On the Klarna app home screen, click “In-store” at the bottom of the screen, search for the store name you want to shop at, set your budget and create a card. If it’s the first time you’ve created a card then you’ll be asked to add it to Apple Wallet or Google Pay wallet depending on your device. If you’ve done this before, the new card will be automatically swapped into your Apple Wallet or Google Pay wallet.