Do you want to know what's the distance between you and source of light or action (as Fireworks) ?
Or did you want to know what's the distance between you and thunderstorm to get cover or just to stay where you are ?
Now here's the solution it's "Distance By Sound" simple app that let you know the distance by Sound.
Simply when you see the light just press start and when you hear the Sound press i hear it.
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#Note: the distance is evaluative due to nation of Sound, but it's more like to the real distance.
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