I notice that the past usage details in the AGL app only cover 3 quarters and don’t allow an option to review the matching prior period to the current period.
It would be very helpful for the past usage details to at least cover the prior 4 quarters over the last 12 months
You can view this by clicking on the Usage tab across the top. You will then be taken to the Usage screen, and "Billing Periods" can be seen on the top left hand corner. Just make sure you're logged into My Account via the website, not the APP. You can log in here.