Installing OzRunways is no different from any other application.
Tap the App Store icon on your home screen then tap the Search button at the bottom right. Type "ozrunways" in the search box and tap Search.
In the list of applications, tap where it says Get.
OzRunways will now download and install.
After you launch it, you will have the option to begin a one-month free trial.
If you have an existing subscription, choose 'Existing'. Otherwise start a new trial.