Comment by mattaus

MaterialUp is actually pretty smart about this: - It integrates with sites such as CodePen or JSFiddle: i.e: http://www.materialup.com/posts/add-button

- You can view app screenshots directly from the site (see below) and it you click on the big preview, it'll take you to the actual app. i.e: http://www.materialup.com/posts/dailymotion