# KnockKnock - Family Check-in — One tap to know they're okay

> One tap to know they're okay (iPhone/iPad app by sutekidane.)

- Source: https://appshunter.io/ios/app/knockknock-family-check-in/id6762135188 (this page in markdown: same URL + `.md`)
- Developer: [sutekidane](https://appshunter.io/developer/1859657284)
- Category: Utilities, Social Networking
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 70 MB
- Languages: English, Korean
- Released: 2026-04-28
- Data updated: 2026-07-01
- User reviews in markdown: https://appshunter.io/ios/app/knockknock-family-check-in/id6762135188/reviews.md

## What is KnockKnock?

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/

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Group Creation | $3.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-05-14

Fix bugs

### 1.0.1 — 2026-05-08

Fix minor bugs

### 1.0.0 — 2026-04-28

No release notes.

## More apps by sutekidane

- [Letmeknow - ai reminder](https://appshunter.io/ios/app/letmeknow-ai-reminder/id6756268904)

All apps by sutekidane: https://appshunter.io/developer/1859657284

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-01.*