RootMetrics (formerly Root Wireless) offers scientifically collected and crowdsourced mobile network performance information to consumers and the industry. The firm captures user information by testing network performance when consumers are using their mobile phone for voice or data communications. RootMetrics was acquired by analytics firm IHS Inc. in 2015. RootScore Reports provide mobile network comparison information based on the company’s testing. In the United States, the firm publishes reports for the U.S. as a whole, the 50 U.S. states, the 125 most populous U.S. cities, and the 50 busiest U.S. airports. In the UK, RootMetrics publishes RootScore Reports for the four UK nations, 16 most populous metropolitan areas, and three London airports (Heathrow, Gatwick, and City).