I am interested in an ECU Performance Upgrade and understand that APR and a few other companies are about to launch the software. I was informed by one vendor that it takes 3 days to upload and Dyno the car which seems odd to me considering everyone else states about an hour.

is there a reason why it would take 3 days?
I was also informed that there's only one manufacturer in UK that produces APR software but thought APR made their own?