One of my customers looking for an App to fulfill for below requirement. 

The customer is a luxury dairy product (clotted cream) manufacturer. They distribute products locally via a fleet of small vans.

Their requirement is for an app which the van drivers used to process their daily deliveries. The orders would be downloaded to the app each day and deliveries would be made as if we were using a mobile live device. As the vans would go in an out of internet range, the app would need to be able to buffer data and download when contact was re-established.

Customer would like to know if there are any known apps or customers who have already developed something along these lines. 

It’s hard to imagine that this requirement is unique as there are thousands of companies delivering their own products on their own vehicles. So I’d hope the IFS community could suggest some known APPS with any past experience.