KnockKnock - Family Check-in
One tap to know they're okay
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
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/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fix bugs
The developer, sutekidane, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Contact Info
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- sutekidane
- Size
- 73.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Korean
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Group Creation $3.99
- Copyright
- © sutekidane