With the Router-Keygen app one can recover router WiFi keys. Rui Araújo develops and supports his free app. At version 3.150 over 500,000 fellow users are continuing to download this app since May 17, 2015. This enjoyable fun app permits users to browse the Internet anywhere. One minor drawbacks is that it must be compatible with the router or else it will not function. However, the app works with several public routers and is also easy to use. After downloading, one presses "scan" then selects the needed password from the Wifi list, copies and then pastes the password.