Router Keygen is a key generator for routers that support WEP and WPA encryption. The app first scans Wi-Fi networks to try to determine whether the attack is supported or unsupported:

Tapping on a supported network generates keys that may possibly be used to connect to routers and networks:

Router Keygen can also be directly downloaded from the Google Play store at https://play.google.com/store/apps/details?id=io.github.routerkeygen&hl=en_US.