. Market Data provided by Interactive Data (. 长城彩票官网 fundamental data provided by . Earnings estimates data provided by Zacks. Mutual fund and ETF data provided by . Economic data provided by Econoday. Dow Jones & 长城彩票官网 Terms & Conditions.

This material may not be published, broadcast, rewritten, or redistributed. ©长城彩票官网 FOX News Network, LLC. All rights reserved.

The other apps offer similar features: 5-0 Radio Police Scanner offers alerts from everything from pandemics to natural disasters to terrorism and crime. It touts itself as the "largest collection of live police, firefighter, aircraft, railroad, emergency, news and ham radios" in its app description. Police Scanner + has more than 40,000 scanners available for free, and users can chat with each other over the app, according to its description.

Some protesters and reporters have been using the apps to stay informed about potential military intervention and hold police accountable for violent or discriminatory speech. One reporter of a New York police officer that appeared to say, "Shoot the motherf***ers," in response to another officer saying protesters were blocking traffic.