In addition to learning to code with blocks, there are many things to keep in mind when developing mobile apps. One important aspect is design. What do we mean by design? The word design seems to imply look and feel, but it also includes function. An app that is designed well is not only visually appealing, it is also easy to navigate and intuitive. When first building mobile apps, the tendency is to want your app to do it all and have lots of bells and whistles. But really, you want your app to be clear and straightforward in its function and purpose. Let's say you're building a book review app that shows user inputted reviews of books. You will not want it to also include music reviews. Just because your app is set up to easily add more categories doesn't mean you should add more content or features. When starting out, it is better to have a clear, precise purpose and scope for your app. And, because of the relatively small real estate of the mobile device screen, it...