Dont. Bother, Too slow.
I downloaded the app hoping to be able to quickly pull out any loyalty card quickly. The app is too slow to load, which is weird since the cards are technically saved and no internet connection is needed. It has been ALWAYS faster and more convenient to search for the wallet in my bag, pull out the card and show it than actual waiting for the app to load. Another annoying thing is that the app watermarks all its cards with its logo, name and image when adding the cards to iPhone Wallet.
Stravoula about
Stocard - Rewards Cards Wallet, v6.2.3