If there is, you should be able to come up with it via your research. You may find some examples on Github, where as others maybe found through tutorials and such. Your primary goal here should be to learn what you need to do to make this app a finished product. Go and read (or watch) different tutorials on this type of app and see the different types of components that go into it. Then go and learn those components, make small projects with it. Once you have the components, you will be able to reuse the code and put it in your official app. It really is a matter of research and understanding at first.