# Who's at the Door? — Who's Knocking? Open Up!

> Who's Knocking? Open Up! (iPhone/iPad app by Stefan Van Damme.)

- Source: https://appshunter.io/ios/app/whos-at-the-door/id6818487128 (this page in markdown: same URL + `.md`)
- Developer: [Stefan Van Damme](https://appshunter.io/developer/1043724055)
- Category: Games, Entertainment, Simulation, Strategy
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 27.0 · 82 MB
- Languages: American English
- Released: 2026-10-27
- Data updated: 2026-10-29

## What is Who's at the Door??

Knock knock. Who's there? Better check… then CLOSE IT. DuoDoor is a door-closing reaction game built around the hinge of iPhone Duo. Your phone is the door. Unfold it to peek inside, and if something nasty lunges at you, fold it shut as quickly as you can. Your reflexes are timed to the millisecond. KNOCK. PEEK. FLINCH.

Listen. Someone is knocking from inside, and you'll hear and feel every knock.
Unfold your iPhone Duo to slowly open the door.
A burglar? A raccoon with your keys? Wait for the lunge, then fold the door shut.
Just Nana with cookies, or the pizza guy? Leave it open. Closing the door on friends gets you a cheeky comeback, not a score.

TIMING IS EVERYTHING
Close too early and you lose the round. Too slow and it got you. Some villains are only bluffing and never strike, so closing the door the moment you see a scary face won't save you. Only a real FLINCH scores, timed to the millisecond.

TWO WAYS TO PLAY
Knock Knock! Endless rounds of knocks, peeks and quick closes. Keep chasing a faster time.
Flinch Three A daily challenge: three FLINCHes, one run a day, and your best time counts. Come back tomorrow for another go.

MEET THE NEIGHBORHOOD
A hand-illustrated cast of 15 callers: Pizza Pete, Cookie Carol, Officer Dana, Troop 42 and more, plus a rogues' gallery of Bandit the raccoon, Sticky Fingers, the Porch Pirate and The Auditors. Study them in the Who's Who yearbook before you open the door.

SEASONAL SURPRISES
At Halloween the regular cast steps aside for trick-or-treaters: ghosts, a little witch, Frank and a black cat. But keep an eye on the sky. When the UFO shows up, the alien never bluffs. At Christmas the room gets a wreath and festive decorations.

COMPETE WITH YOUR FRIENDS
Game Center leaderboards for Fastest Close and Flinch Three
Your own top-10 fastest door closes
A history chart that shows your reflexes improving over time

BUILT FOR THE FOLD
Made for iPhone Duo's hinge. Folding and unfolding is how you play.
Turn on the live hinge-angle readout to watch your door open degree by degree
Rich haptics, knock sound effects and a cozy soundtrack
The room switches between day and night with Light and Dark Mode
Supports Reduce Motion

NO FOLDABLE? NO PROBLEM.
DuoDoor also plays on any iPhone. Swipe the door open and tap to close it. Free to play. One optional purchase removes all ads for good on every device signed in to your Apple ID.
Quick reflexes, a jump scare, and a lot of laughs. Can you close the door faster than your friends?

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Is Who's at the Door? safe?

Not enough ratings yet to assess Who's at the Door?.

## Is Who's at the Door? legit?

Who's at the Door? appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Who's at the Door? is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-10-28

+ Fixed a character name in the photobook
+ Fixed the "Show Angle Degrees" option for iPhone Duo

To learn more about the Who's at the Door app or if you have any questions, go to https://www.stefanvd.net/support

### 1.0 — 2026-10-27

No release notes.

## More apps by Stefan Van Damme

- [Aurora Player](https://appshunter.io/ios/app/aurora-player/id1043744348)
- [Hard Disk - Monitor Disk Usage](https://appshunter.io/ios/app/hard-disk-monitor-disk-usage/id1043842695)
- [Turn Off the Lights for Mobile](https://appshunter.io/ios/app/turn-off-the-lights-for-mobile/id1044081431)
- [My Christmas Tree - Countdown](https://appshunter.io/ios/app/my-christmas-tree-countdown/id1062397646)
- [Traffic Blinker - Bicycle Tool](https://appshunter.io/ios/app/traffic-blinker-bicycle-tool/id1073990483)
- [Turn Off the Lights for Safari](https://appshunter.io/ios/app/turn-off-the-lights-for-safari/id1273998507)

All apps by Stefan Van Damme: https://appshunter.io/developer/1043724055

## Related topics

[the door app](https://appshunter.io/ios/topics/the-door-app)

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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 2026-10-29.*