Fireworks by Grucci, the company presenting Jersey City's fireworks, has rolled out a free app to sync music with the fireworks display.

Available on iOS and Android, the app allows people attending the fireworks show to hear music that goes along with the show right from their smartphone.

The Freedom and Fireworks Festival will be held on Saturday at Liberty State Park from noon to 10 p.m. with carnival ride, live music and food. The festival will end with the fireworks show.

Check out how your town in celebrating Fourth of July here.