Yes. First, websites are stagnant. If there is breaking news, you can post it to your website, but you have wait for users to look at your website. In the meantime your voters can be receiving another angle of the story elsewhere.
You are not the first to reach them. With this app, you send breaking news in your own words directly to the voters phone so they receive what you need them to know in real time.
Second, voters are increasingly using their smartphone more than their desktop, but they could benefit from state of the art features, which are only capable for apps.