Read on for a full review of the best NJ sportsbook apps, and be sure to check out our New Jersey sports betting apps FAQ at the end of this article. It was one of the first states to officially legalize sports betting and is now home to some of the most popular online sportsbooks in the country. New Jersey is the state most credited with helping the U.S. Each of the New Jersey sports betting apps featured here has been carefully reviewed to ensure they are safe and provide a large variety of odds. Sports fans in New Jersey have many great options when it comes to placing wagers on their favorite teams and players.