The last free day comes from the shipping line schedule that your team already maintains. Per-diem starts after it. Holiday and weekend handling follows whatever the line's specific policy says.

Plug-in and plug-out events come from the operator's tablet at the moment of the move. The billing line is hour-accurate. Temperature anomalies flag for the ops team without interrupting anything else.

Each customer logs in to a view of their own open charges. They download invoices, flag disputes line-by-line, and your billing team answers in the same view instead of in a forty-message email thread.