Add a photo of your floor plan, or a quick sketch on paper. It sits under the paint so the heatmap lands on real rooms. Skip it and paint on the open grid.
Save the current map, then move the router and paint again. Overlay outlines a saved survey on top of the live one so before and after sit in the same view.
Browsers cannot read Wi-Fi signal strength in dBm, on any platform. So this version measures what you actually feel: real download, upload, and ping at every spot you stand.
Photo of a printed plan or a paper sketch. Or just use the grid.
Drag to pan, pinch to zoom, tap to place yourself.
Each spot paints a cell. Weak spots flag automatically. Save surveys and compare after moving the router.
Runs entirely in this page. Surveys stay on this device. Speed tests use Cloudflare's public endpoints.