PocketNEM provides a quick way for a trader to see what is happening in the Australian National Energy Market.
Data is available as numeric values or as a graph. Just rotate the screen to switch views.
The app is free, but will need a subscription. You purchase that from inside the app. Your iTunes account will get charged only when you confirm the purchase.
Currently we are offering 3month, 6month and yearly subscriptions. At the end of the subscription period, if you have not turned off the auto-renewal, the subscription renews, and your iTunes account is charged again. You can turn off the auto-renewal in iTunes. See Apple's support documentation on managing subscriptions.
If you also have an iPad with the same iTunes account, you can install PocketNEM, and then "Restore" your subscription you purchased on your iPhone/iPod.
Right now, for the rest of February, we are giving away 3 month subscriptions at an introductory price of only $0.99. Get it before the price goes back up, and you will be set for the next 3 months.