The New York Civil Liberties Union has released the "Stop and Frisk Watch" app for Android phones that lets users record and report police activity to the group.
Members of the group said the app would counter "abusive, discriminatory policing." The app was released Wednesday.
"The NYPD's own data shows that the overwhelming majority of people subjected to stop-and-frisk are black or Latino, and innocent of any wrongdoing," said Donna Lieberman, executive director of the NYCLU. "Our app will allow people to go beyond the data to document how each unjustified stop further corrodes trust between communities and law enforcement."
Stop and Frisk Watch is available in English and Spanish and works only in New York City. The group plans to release an iPhone version later this summer.
The app also has a "listen" feature that alerts the user when people in their vicinity are being stopped by the police. When other app users in the area trigger Stop and Frisk Watch, the user receives a message reporting where the police stop is happening.
Watch a video demonstrating the use of the app here.