Pest Register is not built to work offline.
If you are in the middle of filling out a new report and your device goes offline, don't stress! The system will automatically save a copy of the incomplete report locally onto your device.
You will be able to tell if a report has been saved locally with the small orange exclamation icon next to the "Create New Report" link in the navigation menu.
To complete filling out the report, you will need to reconnect to a WiFI or cellular connection.
From there, you can save it as a draft or publish it.