The source is your Android device and the Google playstore when you check the WebSafety app. If you don't have it, then you'll have to take my word for it.
It's out there to be seen. On IOS you can't see it but as of a couple of weeks ago Company stated in one of their responses to a user that they had reached 20k between both Android and IOS. That was when Android read over 5 thousand downloads.
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