Ask Siri
Say "Open my Albert Heijn card in ShowCards" and Siri opens that card full-screen, ready to scan. It works with any card name, and there is nothing to set up first.
Find cards in Spotlight
Swipe down on your home screen and type a card's name in the search field. Your ShowCards cards appear among the results; tap one to open it. Only names and labels are searchable, never your card numbers.
When the app is locked
If you protect ShowCards with Face ID, your cards are kept out of search so nobody can reach them without unlocking. Turn the lock off and they become searchable again.