A wallet creator app is an application that allows you to create and manage a digital business card. This type of app is capable of creating wallet cards that you can store and share on your mobile device, much like a printed business card.
Some wallet creator apps also offer the ability to share the created digital business card directly via WhatsApp or as a web business card on a website. meetergo is an example of a card creator app available on the App Store. Just search for "meetergo." It allows you to create and manage your own digital business card.