How mobile-friendly is Volaris?
The iOS apps from Volaris will work with all of your Apple devices, from iPad to iPhone
For Volaris VClub members, you'll be able to manage your account from the app, though using their website will no doubt provide more functionality
The Android apps from Volaris work with all Android phones and tablets from various manufacturers (Samsung, LG, Google, etc.), and Android Wear watches might also be compatible. You can get the same stuff done on the Android app as you can on the iOS app for Volaris.
Also take a look at Volaris's website by clicking here — you should be able to do what you need there.