Control your traffic with NetGuard
NetGuard provides simple and advanced methods to block certain apps from accessing the internet, without requiring root privileges. Applications and addresses can be individually allowed or denied access to your Wi-Fi and/or mobile connections, allowing you to control exactly which apps are able to phone home or not.
Tor for Android with Orbot
Orbot is a free proxy app that empowers other apps to use the internet more securely. Orbot uses Tor to encrypt your Internet traffic and then hides it by bouncing through a series of computers around the world.