Add Verizon to the list of tech giants that can't resist the temptation to offer their own virtual private network services. The carrier (and Engadget's parent company) has released a Safe Wi-Fi app for Android that uses the encryption of a VPN to protect you against dodgy WiFi hotspots. Ideally, you won't have to worry about a fake access point intercepting your data traffic at the airport or coffee shop. The app even blocks ad trackers that can lead to targeted marketing -- yes, the telecom that got in trouble for aggressive ad tracking is now helping you avoid it.