I am new to freelancer, but have been consulting for 15 years. I have successfully written and launched several products and would be happy to provide details and references.
I have extensive experience developing applications for Quickbooks.
I will need to have clarification on the specific requirements of the app. For example when the device is not connected, what information needs to be available for the driver? What information needs to be updated and when? Only at warehouse etc.
I would be happy to work these details out with you.
Have a great day...
Brent McCaw