Antwerp, Belgium, 27 October 2026
Who's at the Door? turns your iPhone Duo into a doorway
A free knock knock reaction game where every caller is a gamble: shut out the villains in milliseconds, but never flinch at grandma.
Independent developer Stefan Van Damme today released Who's at the Door?, a free reaction game for iPhone and the first game designed for the foldable iPhone Duo, available now on the App Store.
The door cracks open and a caller steps into the doorway. Players have a split second to decide: friend or foe? Tap to close the door on the burglar, the porch pirate, the missionaries, the wino, the raccoon and a UFO alien. But flinch at cookie Carol, grandma, the cookie scouts, the firefighter or the pizza courier and the round is lost. The score is the player's FLINCH time, measured in milliseconds.
On iPhone Duo, unfolding stretches the wall and doorway across both screens, revealing each caller waiting at your door. A daily seeded challenge, Flinch Three, gives every player the same callers and pounce timings, with rule twists like Quick Draw and Rogues' Day. Game Center leaderboards track the fastest flinches worldwide, and seasonal themes dress the doorway for Halloween and Christmas.
Who's at the Door? is free on the App Store for iPhone and iPhone Duo, supported by a small banner and the occasional interstitial. One optional purchase removes ads forever.
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Who's at the Door? is developed by Stefan Van Damme, the independent Belgian developer behind the Turn Off the Lights browser extension and a catalogue of apps, games, and widgets. More at www.stefanvd.net.