How to find Wi-Fi dead zones in your house
A dead zone is rarely the whole house. It's a room, a corner or a floor. Here's how to find exactly where your Wi-Fi gives up, and why.
Wi-Fi heatmap for iPhone
Find your Wi-Fi dead zones, room by room.
Walk through your home with your iPhone and get a color map of your Wi-Fi: strong where it flies, red where it drops.
- Create a floor plan of your home
- Measure connection quality in every room
- See the weak spots on a map
Your maps stay on your iPhone
Full bars in the living room. Nothing in the bedroom.
Wi-Fi fades with distance, walls, floors and even furniture. Guessing where it fails leads to moving the router at random or buying an extender you may not need. A map shows you exactly where the signal gives up, so you fix the right spot.
How it works
- 1
Create a floor plan
Walk through your home with your iPhone to draw the rooms you want to check.
- 2
Measure every room
Move from room to room. The app records how your connection responds where you stand.
- 3
Read your map
Colors show where Wi-Fi is strong and where it drops, with a quality score out of 100.
One look, and you know where the problem is
Each room gets a color and a label, so the weak spots stand out even if you don't know anything about networks.
Network quality
● Fair- Living room: excellent, right next to the router
- Kitchen: fair, one wall away
- Bedroom: weak, behind two walls
Free guides to fix your Wi-Fi
Practical answers to the questions people ask most about weak Wi-Fi at home.
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Where to put your router for the best Wi-Fi signal
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Wi-Fi not reaching one room? 9 fixes that actually work
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Mesh vs Wi-Fi extender: which one do you need?
Both promise Wi-Fi in every room, but they work very differently. Here's how to choose, and how to check whether you need either before buying.
Frequently asked questions
What is a Wi-Fi heatmap?
It's a floor plan of your home colored by Wi-Fi quality. Warm colors mark weak spots and dead zones, cool colors mark areas with a strong connection, so you can see at a glance where the signal fails.
Does the app show signal strength in dBm?
No. iOS doesn't let apps read the raw Wi-Fi signal value, so no App Store app can show real dBm on iPhone. WiFi Heatmap measures how your connection responds in each spot and turns it into a quality score and the colors on the map.
Do my maps leave my iPhone?
No. Your floor plans and measurements are saved on your iPhone.
Do I need extra equipment?
No. You only need your iPhone and the Wi-Fi network you want to check.
Is it a speed test?
No. A speed test measures your internet line to a remote server. A heatmap shows how your Wi-Fi changes from room to room, which is where most problems at home actually come from.
Stop guessing where your Wi-Fi fails
Map your home in a few minutes and fix the right room first.