World's first sign language messenger app
Five App is an app that the deaf and the hearing can use to send sign language messages to each other.
The app has been designed by an 18-year-old Polish teenager, Mateusz Mach, and his friends. They started it as a fun project but soon it became something useful.
The app works in iOS and Android and can also send animated messages over Facebook Messenger.
You can even change the facial expressions of the small animated character to show anger, frustration, or joy.
Five app can also be used to communicate with a deaf person sitting in front of you by passing signs back and forth.
The app is being used by the biggest organization for the deaf in Poland.