A printed QR code has no battery, subscription, or hidden expiration date. If the pattern is still readable, a phone can scan it.
But the scan has to lead somewhere.
That destination may depend on a hosted page, a redirect, a domain, an account, and an organization that has to keep the whole chain running. The printed square may last twenty years. The service behind it is the part worth investigating.
I audited 14 digital business card services
I kept seeing words such as free forever, permanent, and never expires. They sound reassuring, but they do not always describe the same thing.
