Davinote takes cash or card. Cash needs nothing set up. A card has to be saved once, and then it is offered at every checkout where the business accepts cards.
Open Payment methods
Tap your profile photo at the top left, then My payment methods. Saved cards are listed with their type and last four digits.
Your DaviCoins balance is not here. That lives in My referrals.
Tap Add card
A secure card form opens. Type the number, the expiry date and the security code.
Save it
The card is checked as you submit. A wrong number, a past expiry date or a badly formed security code is rejected with a message saying which.
Add more than one if you like
There is no limit worth worrying about. Every saved card appears in the list and can be chosen at checkout.
Remove a card
Open the card's options and choose to delete it. Davinote asks you to confirm, and only then removes it, telling you when it is gone.
Cancelling the menu, or cancelling the confirmation, leaves the card exactly where it was.