Tutorial

Let's build COSMOS

Learn by doing with our C4-powered app-building tutorial. Let us walk you through the process of how we built a nice little iOS app called COSMOS.

Chapter 9

Stars Background

To convey the enormity of space, and give the app a really nice feel, we stacked 8 parallax layers with randomization and subtle animation.


  1. There are a few reasons for this… One, its a bit weird to have all the stars side by side because we’re going to apply some nice scaling that would otherwise overlap them. Two, if the gaps were really short then there’d be no need for a menu to select and animate between the layers. Three, the animations between layers look way better if there’s a big gap. Four, we’re thinking about V2 where we add some little interactive bits into those spaces so that people can explore the app more. ↩︎