Fleet work happens where the signal doesn't: underground garages, construction sites, warehouses, the road between two towns. A driver app that needs a connection for every tap ends up unused exactly when it's needed. The Trace4X driver app is built to work offline.
Everything is saved on the phone first
When a driver changes duty status, submits an inspection, reports an issue, checks equipment or sends a message, the app saves it on the phone and shows the change right away. The driver doesn't wait for a server, and doesn't have to remember to do it again later.
Sent in order when the connection is back
Saved actions wait in a queue and are sent automatically, oldest first, as soon as the phone is online again. Photos and voice messages are uploaded with them. If the server is temporarily unavailable, the app tries again; nothing is lost because a request failed once.
Drivers can see what's waiting
A pending-sync page in the app shows every action that hasn't been sent yet, with its status, and an indicator in the app bar shows when something is still waiting. If a driver wonders whether an inspection went through, the answer is one tap away.
What works offline
- Duty status changes
- Scheduled inspections, including required photos
- Issue reports with photos
- Equipment checks
- Chat messages, photos and voice messages
- Maintenance reminders and issues for the connected vehicle
Data the driver has already opened, such as the vehicle's reminders and open issues, stays available without a connection.
What needs a device, not a connection
Live tracking doesn't come from the phone at all. Vehicle position, mileage and engine data come from the telematics device installed in the vehicle, which reports on its own.
For the office
Supervisors see offline work as soon as it syncs: inspections appear in the compliance view, issues in the issue list, messages in chat. Nothing has to be re-entered.