Telemundo 51 is a free news and weather application that offers users access to the latest local news, weather forecasts, live TV, and investigative journalism. The app is designed for iPhone users and provides accurate weather forecasts for the southern Florida and Miami regions. It also offers hourly forecasts with customizable graphics, detailed weather information, and alerts for severe weather.

The app provides personalized alerts for local, national, and international news stories, including a breaking news section that shows articles in reverse chronological order. It also features a live streaming section where users can watch Telemundo 51 newscasts and other content. The app has a specific section dedicated to videos and sports, as well as award-winning investigative journalism and consumer problem-solving by Telemundo 51 Responde.

Furthermore, the app includes financial news from CNBC and national and local news from NBC South Florida. Users can contribute to market research studies such as Nielsen TV ratings, as the app includes Nielsen's proprietary measurement software.

Please note that the app's privacy policy and options can be found on the NBCUniversal website.