Why plan WiFi on a floor plan?
Coverage problems are spatial problems. The same router that covers an open-plan flat perfectly will leave half of a brick-walled house dark. Working on a floor plan lets you see what the signal has to travel through, decide where hardware should go before running cables, and — after a walk survey — see measured reality overlaid on the same plan.
This is exactly how professional installers work; the only difference is their software budget. With a phone app, the workflow is identical: plan → measure → adjust.
Getting your floor plan into HeatFi
HeatFi accepts any floor plan format, three ways:
- Import an image — a PDF export from your architect, an estate-agent listing plan, or any blueprint screenshot.
- Photograph a paper plan — snap the printed plan; the app aligns and scales it.
- Draw it — sketch walls and rooms freehand in a minute or two. Proportions matter more than beauty.
From plan to coverage map
- Mark your router and access points on the plan, where they currently are (or where you're considering putting them for a new setup).
- Walk the space room by room, tapping Take Sample at regular intervals. Each reading is pinned to your position on the plan.
- Generate the heatmap. HeatFi interpolates your samples into a smooth coverage map with per-room scores — strong zones, weak zones, and dead zones in colour.
- Iterate. Move the router, add a node, re-survey. The floor plan makes changes comparable: same plan, new colours.
Reading the map like an installer
Look for coverage edges, not just dead zones. The line where colours fade is where a mesh node or extender belongs (placement guide). Rooms behind two or more walls from the router are structural weak spots — either hardware goes closer to them, or they get wired backhaul. For offices, count how many rooms fall outside the strong band and read how many access points do I need.
Quick answers
Can I plan WiFi coverage before buying a router?
Yes. Put your floor plan in the app, mark the planned router position, and survey with your current setup to understand the building's attenuation. Structural weak spots stay weak spots across routers — placement fixes them, not spec sheets.
What floor plan formats work for WiFi mapping?
Any image works: blueprint PDFs (as screenshots), estate-agent plans, photos of printed plans, or a freehand sketch drawn directly in HeatFi.
Is there a free WiFi planner app?
HeatFi is free on iOS and Android, works offline, and doesn't require an account. You get floor-plan import, walk surveys, heatmaps, and PDF/PNG export.
See your WiFi instead of guessing
HeatFi turns your phone into a WiFi survey tool. Draw your floor plan, walk each room, and get a colour-coded heatmap in minutes. Free — no account needed.
