Works Offline

The device will record punch in and out stamps even when offline, then when it has a data connection again it will upload them to the cloud. This could happen if the wifi in your area is down for example.
A real world usage for this could be builders working on a remote site with no data signal, they all clock in and out for the day on the formans phone, when the forman gets back home and is connected to wifi, the data uploads and the the managers can then see the hours worked on site for the day.