How mobile-friendly is Aer Lingus?
The iOS apps from Aer Lingus will work with all of your Apple devices, from iPad to iPhone
For Aer Lingus Aer Club 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 Aer Lingus work with all Android phones and tablets from various manufacturers (Samsung, LG, Google, etc.), and Android Wear watches might also be compatible. Perhaps standard practice these days, the Android app offers the same functionality as the iOS app from Aer Lingus.
Also take a look at Aer Lingus's website by clicking here — you should be able to do what you need there.