Keep working without a connection
A building inspector can record results in a basement with no signal. The app saves them on the device and uploads them to an online service when the connection returns.
Previously downloaded content can remain available. The app should show whether changes are saved on the device, uploaded or need attention.
What happens when the connection returns?
Two devices may edit the same record while offline. The app needs a way to decide which changes to keep, retry failed uploads, protect saved data and avoid duplicate actions. Local-first apps go further by treating the device copy as the main one you work with, even when connected.