A vCard backup looks complete – until you restore it and every group is gone. The vCard format doesn't store group membership, so Apple Contacts can't bring your lists back. Importer for Contacts can: it rebuilds your Address Book groups and lists as it re-imports the vCard. No subscription, everything stays on your Mac.
When Apple Contacts exports a vCard, it writes out the cards but not which group each card belonged to. Re-import that file and you get a flat pile of contacts with no organisation.
Importer for Contacts assigns each contact back to its lists and creates any group that's missing, so you don't have to rebuild your structure by hand.
Moving to a new Mac or recovering after an iCloud mix-up is far less painful when your groups come back with your contacts.
"Excellent program with very easy steps. Especially for mass contacts or groups."
"This app solved a big issue for me with contact management. I imported hundreds of contacts in a few minutes. Custom mappings work well."
The vCard format doesn't store group membership, so a standard re-import leaves you with ungrouped contacts. Importer for Contacts preserves and restores that information.
Yes. Any list or group that doesn't already exist in Apple Contacts is created during the import.
Yes. All importing happens locally on your Mac; nothing is uploaded.