Basically I want to plot the black spots of no mobile internet in an area. Eg I would like an app that can constantly ping or test internet connection as I move around in a car then GPS log each result, so I can see on a map where the black spots are.

  • Not for internet strength but general signal strength, you can find a bunch of mapping apps in my list here. Not sure if any of them would also cover internet quality. – Izzy Jun 5 '18 at 15:09

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