WiFi Solver FDTD APK a nice andrid apps. When you install this app you can take a floorplan of your house, set the location of a Wi-Fi router, and simulate how the electromagnetic waves propagate. This app uses the 2D finite difference time domain method to solve maxwells equation on a cartesian gird, An example floor plan in built in this apps.

Features –

Screenshots –

File Size – 1.2 MB

Current Version – V2.7

Requires Android –  4.0 and up

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