Phantom Floor: Interactive Projector Floor

Turn any floor into a living, reacting projection.

PhantomFloor runs on an Android phone connected to a projector pointed at the floor. Everything it shows reacts to the people walking on it: fog parts around their feet, spiders scatter from their shoes, snow keeps their footprints, and flowers grow where they walk.

Nothing is a video loop. Every frame is generated live on your phone's GPU, so it never repeats and always responds.

🎃 Halloween

• The Swarm: hundreds of spiders that flee from feet, spread panic through the swarm, and scurry out of a sweeping flashlight beam.
• Ectoplasmic Fog: thick, swirling green-and-purple fog that clears around feet and curls in people's wake.
• Ground Smoke: a real fluid simulation of fog-machine smoke that pours in and flows around legs.
• Cursed Fluid: a bubbling pool of blood or lava that creeps toward guests.
• Living Water: dark water that rises into tentacles, grasping hands and screaming faces.

❄️ Winter

Snowfall, Christmas and Hanukkah (with a menorah lit for the night you choose). Falling snow settles into a snowy floor that keeps every footprint and slowly fills it back in.

🌷 Spring · 🍂 Fall

• Spring Garden: grass and flowers sprout and bloom wherever people walk.
• Fall Leaves: kick through a carpet of autumn leaves that flutter on the wind.

🎆 4th of July · ☀️ Summer

• Fireworks: a burst of color under every step.
• Pool Splash: ripples as you wade, and a big splash when you jump in.
• Fireflies: lightning bugs that follow you and slowly blink in sync.

How it works

• Camera tracking: point the phone's camera at the floor. On-device AI finds feet, or whole people in groups.
• Sound: thunder, screams or music make the scenes pulse and flash.
• Touch: no camera needed. Your fingers on the phone act as feet.
• Cast button: send the visuals to your projector or TV and use your phone as the remote.

What you need

• An Android phone or tablet with Android 8.0 or newer.
• A projector or TV-projector aimed at the floor, connected by screen mirroring / Miracast, an Android TV device that accepts casting, or an HDMI / USB-C adapter. (Chromecast isn't supported.)
• A dark room. Black means "no light", so the effects look like they float on the floor.

Install

1. Download the APK on your Android device and open it.
2. If Android asks, allow installs from your browser or file manager.
3. If you see "Blocked by Play Protect", tap More details → Install anyway. It's flagged only because it doesn't come from the Play Store.
4. Future updates install over the old version and keep your settings.

Privacy

Camera and microphone are processed only on your phone: nothing is recorded or uploaded. The app uses the internet only to check for a newer version.

PhantomFloor is free. If it made your party, a small donation keeps new scenes coming. ♥