Recent Contacts: Date Added — Support

The app shows your contacts newest-added first, lets you filter by date, and exports them to Excel, CSV or vCard.

FAQ

Why do some dates look wrong?
Contacts synced from iCloud, Google or Exchange show when they arrived on this iPhone, so on a new phone they may all look recently added.
Why don't I see dates?
Allow Full Access to Contacts in Settings > Privacy & Security > Contacts.
Does my data leave my phone?
No, everything stays on device.