SkieWhat does the last-seen time on a device mean?
Last seen is the time the device last reported to Skie, whether through a regular check-in, a sync or a location report. It tells you how fresh everything else on screen is. A recent last-seen means the position and status are current; an old one means you are looking at history.
Every piece of live information in the dashboard, including position, battery level and compliance, is only as good as the last time the device spoke. Last seen puts a time on that.
A device updates it in several ways. A repeating alarm about every four minutes reports presence. A sync happens when the internet returns or when the screen turns on after a stale period. A locate request produces a fresh report. So on a healthy device the time stays recent, and a gap is a signal.
Skie's trusted clock is used for sync timing, so a device with a wrong clock cannot make itself look fresh or stale. Date and time on the device are also locked to automatic, which keeps the timestamps meaningful.
Read last seen together with the state. A device that is Due, Overdue or Offline unusual has a last-seen time that has slipped past the limits you set. See Due, Overdue and Offline unusual. Past the final limit it becomes a breach.
A device that is off, out of battery or out of signal simply stops updating, and its last-seen time stays where it was. The rules on the device carry on without a connection, because they are cached on it, and the time catches up when it reconnects.
Practical tip: when you open a device's page, look at the last-seen time before the map or the score. It tells you how much of the rest to trust.