John Herrman / New York Times:

A profile of Citizen, a crime tracking app that notifies users in NYC, SF Bay Area, Baltimore, and LA when a crime or a major incident is reported near them  —  An app called Citizen promises “awareness” of nearby danger.  What it provides is more complicated.

A profile of Citizen, a crime tracking app that notifies users in NYC, SF Bay Area, Baltimore, and LA when a crime or a major incident is reported near them (John Herrman/New York Times)
Source: Tech Meme