Scanning a business card is half the job. The other half is being able to call the person — from your phone, where their name should appear on the incoming-call screen and in Siri, not just inside whichever app scanned the card. There are three ways to get scanned contacts onto an iPhone, and one of them is much better than the others.
Any decent scanner exports a .vcf file; open it on the iPhone (Mail, AirDrop, Files) and Contacts offers to add everyone in it. Simple and universal — but it is a snapshot. Next week's scans mean another export, and edits don't flow anywhere.
Some scanner apps write directly into the phone's address book. It works, but it requires installing and trusting that app with full Contacts access, and the sync logic varies from app to app.
iPhones have supported subscribing to an external address book for years — the same mechanism corporate directories use. If your scanning tool offers a CardDAV endpoint, setup takes one minute and needs no app at all:
meishiscan.com) · your account email and password → NextYour scanned contacts appear in the Contacts app and stay in sync automatically: scan a card at lunch, and the person is in your phone by the time you call them in the afternoon. Caller ID, Siri, CarPlay and search all work, because these are real iPhone contacts. Bilingual data survives too — phonetic name fields mean 山田さん sorts and announces correctly.
Related: digitising the backlog box · what a proper Japanese card scan looks like