I don't know what it is with airline apps, but they seem to have a very high chance of being ugly. Like, really ugly. The Southwest app was certainly one of the ugly ones, but it just got an update that fixes that. I'll let the screenshots tell the story.
Take a look at the changelog here.
- We've brought new design to this version all throughout the app!
- Want EarlyBird Check-In®? Now you can purchase it when you book your flight!
So, the redesign is the big story here, and what a redesign it is. Here's the old app, emphasis on old.
Looks pretty ancient, right? The new app has a proper nav drawer, a bottom bar, shaded status bar, and all the right buttons and icons. It looks like a real Android app!