What you need to know about Southwest mobile apps
Like many other airlines, Southwest offers an iOS app for all of your Apple devices.
For Southwest Rapid Rewards members, you'll be able to manage your account from the app, though using their website will no doubt provide more functionality
As the most popular mobile platform in the world, Southwest has taken notice of Android and provided an app for most Android devices. Perhaps standard practice these days, the Android app offers the same functionality as the iOS app from Southwest.
Also take a look at Southwest's website by clicking here — you should be able to do what you need there.