The latest info on KLM mobile apps
Like many other airlines, KLM offers an iOS app for all of your Apple devices.
For KLM Flying Blue members, you'll be able to manage your account from the app, though using their website will no doubt provide more functionality
KLM has an Android app that works with most Android tablets, phones, and some Android Wear devices. You can get the same stuff done on the Android app as you can on the iOS app for KLM.
Also take a look at KLM's website by clicking here — you should be able to do what you need there.