KnockKnock - Family Check-in

A simple knock to check in on the people you care about. - Hardware-Secured Identity Every response is signed by a cryptographic key stored in your device's secure hardware chip (Secure Enclave). - One Tap, Instant Peace of Mind Worried about a parent who lives alone? Send a knock. If they tap back, they're okay. If they don't, you know to check in another way. No calls, no typing — just a tap. - Built for Families Create a group for your family or close circle. Invite members with a QR code — it takes seconds. Up to 6 people per group. - Simple Mode A single large button designed for anyone who finds smartphones overwhelming. Perfect for elderly parents or grandparents. Joining a group is free. Creating a group requires a one-time purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/