They would still know it's coming from something within range. It's not very hard to figure it out. But like jblosser said, apparently they are clueless. Have you looked at the Google Play store, that now syncs with your devices? You can set a search for apps, free, vpn, and your devices, once it knows what you have. And it would already know your devices, if you've ever used Google Play before. I saw 6 to 8 VPN apps. Just search both platforms separately and see which one's work on both. https://play.google.com/store/search?q=vpn&c=apps&price=1