The Nike+ Training App cannot be used in Airplane Mode because Airplane Mode shuts off all radio frequency communication.
Your mobile device will not be able to communicate with the Nike+ Sport Sensor while your device is in Airplane Mode.
Note: The Nike+ Training App is no longer available for download in the iTunes App Store. If you are an existing user with the app already downloaded and installed, you can continue to use the app as you've done in the past. Be aware that if you have the Nike+ Training App installed and upgrade to iOS 8, you will no longer be able to use the app, as it isn't compatible with iOS 8. For more information, please click here.