Sukey ... collects messages, tweets and photos from protesters and tries to make sense of what is going on.
It then sends that data back to users of the app on the ground.
The app provides an in-built compass which gives an indication of the best direction to move. A red marker on the compass could point towards a police cordon or kettle so a protester caught in trouble should follow the green direction to escape.
By providing this data to those who need it, the team hoped that nobody would unwittingly be caught in a police kettle.