How mobile-friendly is American Airlines?
Like many other airlines, American Airlines offers an iOS app for all of your Apple devices.
Also, if you're a member of American Airlines AAdvantage, you can manage your profile, view your points balance, and more.
The Android apps from American Airlines 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 American Airlines.
Also take a look at American Airlines's website by clicking here — you should be able to do what you need there.