The Onion Router, short GATE, is a collection of programs with which the users against censorship and Surveillance can defend themselves. TOR directs Internet Connections through a network of nodes, so that a follow-up, or an identification of the user is impossible or at least difficult.
Orbot is the official Android version of TOR. On devices with Root access can Orbot directly after the Installation, all App Connections through the TOR network routes, alternatively, you can select the application via the GATEWAY using the Web to communicate. Rooting is, however, no requirement to Orbot to use.
Orbot manages Connections to the Web via the TOR network that protects the privacy of the user. Android users without Root function can use the Software also use, and must then install any additional Apps. So working, for example, the mobile Firefox with the Addon Proxy Mobile with Orbot. Chats can be with the help of the App Gibberbot over TOR-network guide.
You can free download Orbot and safe install the latest trial or new full version for Windows 10 (x32, 64 bit) from the official site.