WiFi Solver FDTD

2.10

jasmcole

2.87

548 reviews

10,000+
Downloads

$1.49

Upload the layout of a room or building and calculate the WiFi distribution.

Not recently updated — last update was on 2023-11-27. This app may no longer be actively maintained.

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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 2.87 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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More data about WiFi Solver FDTD

Price	$1.49
Total downloads	45 thousand
Recent downloads	6
Rating	2.87 based on 550 ratings
Ranking	Not ranked
Version	2.10
APK size	1.37 MB
Number of libraries	18
Designed for Android	4.0+
Suitable for	Everyone
Ads	NO ads

App Performance Report

Get a detailed PDF report for WiFi Solver FDTD with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more

Get PDF Report — $29

Google Play Rating history and histogram

120

160

Downloads over time

WiFi Solver FDTD has been downloaded 45 thousand times. Over the past 30 days, it has been downloaded 6 times.

Changelog of WiFi Solver FDTD

Dec 23, 2023Price IncreaseNew price: $1.49 ($0.99)
Nov 27, 2023UpdateVersion 2.10
May 11, 2022Price IncreaseNew price: $0.99 ($0.68)
Apr 29, 2022Price DropNew price: $0.68 ($0.99)
Apr 22, 2022Price IncreaseNew price: $0.99 ($0.68)
Apr 15, 2022Price DropNew price: $0.68 ($0.99)
May 12, 2021Price IncreaseNew price: $0.99 ($0.90)
Apr 30, 2021Price DropNew price: $0.90 ($0.99)
Apr 28, 2021Price IncreaseNew price: $0.99 ($0.90)
Apr 23, 2021Price DropNew price: $0.90 ($0.99)
Apr 9, 2021Price IncreaseNew price: $0.99 ($0.48)
Apr 4, 2021Price DropNew price: $0.48 ($0.99)
Sep 11, 2020Price IncreaseNew price: $0.99 ($0.77)
Sep 10, 2020Price DropNew price: $0.77 ($0.99)
Jul 31, 2020Price IncreaseNew price: $0.99 ($0.77)
Jul 29, 2020Price DropNew price: $0.77 ($0.99)
Jul 16, 2020Price IncreaseNew price: $0.99 ($0.77)
Jul 15, 2020Price DropNew price: $0.77 ($0.99)
May 20, 2020Price IncreaseNew price: $0.99 ($0.77)
May 19, 2020Price DropNew price: $0.77 ($0.99)
May 17, 2020UpdateVersion 2.9
May 6, 2020Price IncreaseNew price: $0.99 ($0.77)
May 5, 2020Price DropNew price: $0.77 ($0.99)
Dec 9, 2015Price IncreaseNew price: $0.99 ($0.71)
Dec 19, 2014Installs10,000+ installs
Sep 12, 2014Installs5,000+ installs
Sep 12, 2014UpdateVersion 2.7
Sep 6, 2014UpdateVersion 1.5
Sep 4, 2014Installs1,000+ installs
Sep 3, 2014Installs100+ installs
Sep 3, 2014UpdateVersion 1.4
Sep 2, 2014UpdateVersion 1.3
Sep 1, 2014New AppVersion 1.0 in EDUCATION for $0.71

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Developer information for jasmcole

jasmcole

help@wifi-solver.com

Website

N/A

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Comments on WiFi Solver FDTD for Android

★★★★★ 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 · Mar 25, 2015

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.

★☆☆☆☆ 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

★★☆☆☆ 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...

★☆☆☆☆ 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 · Feb 15, 2015

Do I really need to make a rough layout of my house on a separate device to use this?

Google Play Rankings for WiFi Solver FDTD

This app is not ranked

Technologies used by WiFi Solver FDTD

WiFi Solver FDTD is requesting 2 permissions and is using 19 libraries.

Permissions

Development tools

test access to protected storage

Storage

modify or delete the contents of your USB storage

Ad network libraries

None found

Social libraries

None found

Development tools

Android Jetpack core

Android Architecture Components

Android Jetpack VersionedParcelable Android Jetpack Annotations Android Library Icon

Android Jetpack Annotations Android Jetpack Widgets Android Library Icon

Android Jetpack Widgets Android Jetpack AppCompat Android Library Icon

Android Jetpack AppCompat AndroidX Loader Android Library Icon

AndroidX Loader Android Jetpack Media Android Library Icon

Android Jetpack Media

Android Transition Support Library

Android Support Library collections

Android Support VectorDrawable

AndroidX Legacy: Support Library core utils AndroidX Cursor Adapter Android Library Icon

AndroidX Cursor Adapter

AndroidX Local Broadcast Manager

Android Support Library Print

Android Support Library Document File

AndroidX Legacy: Support Library core UI

Android Support Library Async Layout Inflater

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