Allowing users to communicate even when a natural disaster affects phone signal, the app is the most-downloaded software this week. It's also possible to send pictures -- but the app does use up a lot of battery. Contrary to some reports on social media, the app does require an internet connection. On Friday, with Hurricane Irma looming, thousands of users in Florida took to the app to swap tips. But the company warns the app is not intended as a replacement for coordinated rescue efforts, and urged users to follow official instructions.

Source: The Nation Bangkok September 09, 2017 00:22 UTC