Check out how pro-democracy protesters in Hong Kong are using a mobile app to connect with each other.
Article by Archie Bland for the Guardian
Joshua Wong, a 17-year-old student in Hong Kong, had a problem. You will have experienced a version of it yourself: you are at a football match or a gig and you need to find a friend. But the crowd means that the network is overloaded, and you can’t get a signal on your phone. The thing that means you need to call someone is the very thing that means you can’t.