We've actually accomplished this with the Marketing Technology Blog through a third-party platform that optimizes the visual content and lays out the posts and pages in an application that's beautiful but never requires updating. We did this with a company called Postano who have several clients on it. We're working on actually partnering with them to deploy it to more people. The platform they built connects to your WordPress site but outputs native applications for both Android and iOS (and others). It's not using PHP OR WordPress - just driving and optimizing the content FROM WordPress to a third-party platform for content optimization.