Upload the layout of a room or building and calculate the WiFi distribution.
About WiFi Solver FDTD
WiFi Solver FDTD is an education app developed by jasmcole.
Download Statistics
WiFi Solver FDTD has been downloaded 45 thousand times. In the last 30 days, the app was downloaded 6 times.
User Ratings
WiFi Solver FDTD is rated 2.71 out of 5 stars. The rating is based on 550 ratings.
App Information
WiFi Solver FDTD costs $1.49 to download. The APK download size is 1.37 MB. The latest version available is 2.10. The last update was on November 27, 2023.
Technical Requirements
WiFi Solver FDTD requires Android 4.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play September 2014.
Description
With this app you can take a floorplan of your house, set the location of a WiFi router, and simulate how the electromagnetic WiFi waves propagate.
Read more at https://wifi-solver.com
See the app in action in the following video by tech news website The Verge:
https://www.youtube.com/watch?v=6ADqAX-heFY
This app is based on a post 'Helmhurts' at my blog 'Almost Looks Like Work', which was featured on Engadget, Ars Technica, and many other publications:
https://jasmcole.com/2014/08/25/helmhurts/
This app uses the 2D Finite Difference Time Domain (FDTD) method to solve Maxwell's equation on a Cartesian grid. An example floorplan is included in the app.
How to use:
Your floorplan needs to be a .png file, with empty space marked black and materials marked with colours. Images will be converted into the correct materials on loading - this may take a few seconds.
Pixels are mapped to 1 centimetre, so scale the floorplan appropriately.
The simulation is limited in speed due to the mobile processor, so try to keep images below approximately 1000x1000 pixels
Touch the image to set a router location, marked by a red circle. Select the antenna parameters at the bottom.
Choose what to plot - 'Field' is the instantaneous electric field amplitude, 'Flux' is the time-averaged magnitude of Poynting flux.
Click run and the simulation will begin. Click stop to pause at any time - this saves the simulation progress which can be continued by clicking run again. To reset, open an image again.
To save the simulation output as an image, click Save at any time. Images are saved to internal/external storage and added to the end of the camera roll.
To start recording a simulation click the record 'R' button. When the simulation is stopped a GIF animation is generated.
Under the bonnet:
An antenna oscillates at 2.4 GHz. The edges of the image use absorbing boundary conditions as in Mur 1981, IEEE Transactions on Electromagnetic Compatibility.
Where walls are defined, the relevant refractive indices and loss tangents for 2.4GHz radiation are used.
Disclaimer:
This app is not intended as a replacement for existing EM simulation software packages. As a 2D approximation including only simple walls it may not accurately model a given floorplan.
Recent changes: Updated app to be compatible with latest Android SDK versions.
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5 GHz option? Many routers these days include a 5 GHz option, which allows for reduced interference. 5 GHz of course is attenuated to a greater degree than 2.4 GHz, which would probably change the results of the output.
★★★★★Cio Redulla· Jun 6, 2020
Please add an option to create more wireless APs and multiple antennas. 5GHz too.
★★★★★Zsolt Pinter· Sep 29, 2025
I have the plans of my house, so I could use gimp to create the Wi-Fi solver map in half hour for both first floor and upstairs. I also scaled down to the describe cm/px rate. The app works as described, very interesting. I saved multiple simulations and stored it in my cloud storage, so I don't need resimulate again. I spent about 5–7 minutes for simulation and recording on OnePlus 13R, but the saved GIF shows half of the time would have been enough because after that there was not too many chang
★★★★★A Google User· Oct 16, 2014
Great app! Would love to have the option of having 3 antennae on the router as well (mine does), but still, awesome app! 10x
★★☆☆☆A Google User· Sep 19, 2014
Very difficult If you don't have a PNG file of your house floor plan, or can't draw to scale: 1 pixel per centimeter. I'm pretty technically savvy, this was very difficult, I gave up...
★☆☆☆☆FAsTVSIX· May 21, 2022
Contacted Google and can't get a refund contacted developer and no response for a refund. App need a floor plan which I can't get
★☆☆☆☆Us Crowley-Beck· Dec 26, 2015
Didn't do anything Take your floor plan and draw a circle around the router. That will save yourself the trouble of coloring and sizing the doc to feed it into this app.
★☆☆☆☆A Google User· May 21, 2015
1pixel = 1 cm. 500x500px maximum .png floor plan. That means you can only simulate a ROOM 5x5 meters. LOL. I was specking to simulate at least a floor not a room. Thumbs down.
★☆☆☆☆A Google User· Feb 15, 2015
Do I really need to make a rough layout of my house on a separate device to use this?
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