How mobile-friendly is Ryanair?
The iOS apps from Ryanair will work with all of your Apple devices, from iPad to iPhone
For Ryanair Ryanair Airlines Frequent Flyer Program 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 Ryanair 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 Ryanair.
If you're just looking for their mobile site, you can head on over to http://www.ryanair.com on your mobile device.