Hotspot Shield VPN Proxy, WiFi. Protect your internet activity - AndroidTapp. By now, you know that it is dangerous to connect to public WiFi, either at your local coffee shop, in an airport, at a hotel, or wherever, without using a VPN tunnel to get to the Internet. VPN apps connect you through a proxy, and encrypt your traffic both ways. This prevents sniffers from grabbing your passwords, user names, and other stuff on your computer. Yes, it will slow you down a little; but, the paid version of apps like HMA, or this one for Android use, will keep you safe. This one costs $29.95 a year if you don't want bandwidth limitations. Small price to pay for peace of mind, no?