How a room can sense you without seeing you

The Wi-Fi in a home is constantly bouncing off walls, furniture, and people. Every time someone moves, whether a step across the floor or a sudden fall, they change the way those signals travel, in tiny but measurable ways. Most devices throw that information away. Stillsense reads it.

From signal to meaning

A small sensor pairs with the Wi-Fi in a room and continuously reads the fine detail of the signal, what engineers call Channel State Information. No image is ever formed, because there's no camera to form one. On the device itself, Stillsense interprets those changes: it recognises presence, movement, and falls, and learns the ordinary rhythm of a normal day, so it knows what "unusual" looks like.

It's the same physics a router handles millions of times a second. Stillsense simply listens to it differently.

Why it works where cameras can't

Because Stillsense senses the whole space rather than a camera's cone of view, it has no corner it can't see. It works in the dark, under blankets, and around obstacles. And because everything is computed at the edge (in the home, not the cloud), the raw signal never leaves the room.

Honest about what's proven

Sensing movement from Wi-Fi is well understood in research. Making it dependable in a real, lived-in home, with pets, draughts, and furniture that moves, is the harder part, and it's where we focus. We publish the maturity of each capability plainly: presence, motion, bed-exit, falls, breathing-rate, and heart rate are available today; fall detection, breathing-rate, and heart rate have independent validation planned before any safety-grade or clinical guarantee; and anything that isn't dependable enough for a real home, we simply don't ship.

For the wider picture, including what Wi-Fi sensing can and cannot detect and how it compares with cameras and radar, read our guide: What is Wi-Fi sensing?