How measure consumption data

[Marco Scarnatto]

(Translated by Google)

Hi.

In internet can not find exactly what I want, and maybe someone can give me a help.

I'm thinking of going measuring the amount of bytes transmitted from my APP, to be careful not to spend what you have hired in the data plan (3G / 4G, etc)

Obviously I can access this info looking at the info of APP

But I'm wanting to do it from javascript code

Is there a plugin for this you know?

Would it suffice, just with counting how many bytes go shipping every call (a Google Firebase in my case)?