Digi Card Pros gives you two free digital business cards under one login: Personal and Business, each with its own QR code. Someone scans it, taps "Save to contacts", and your name, photo, number, email and links go straight into their phone. No app on either side. Card links can't be guessed, and if one gets passed around, a single click issues a new QR and kills the old link. Preset themes, pause a card any time. Free, no paywall.
