Daily UI Challenge 003 / 100. This landing page is based on a case study I did for a mobile app I designed for my Game UX portfolio. I always thought building a landing page for an app was unnecessary. However, when you think about the app stores in general, how much information can you really provide there? When you want to communicate more information for the user, landing pages help. It’s also about funnelling your traffic into another call to action (CTA).