There sorta is. Install the OpenVPN app, load your ovpn config, and connect. After you do that, there will be a VPN option on the homepage of your settings that

There sorta is. Install the OpenVPN app, load your ovpn config, and connect. After you do that, there will be a VPN option on the homepage of your settings that will use the connection automatically and will keep you connected when switching networks. Source: Figured it out over the weekend and have been pleased by it for the past few days.