Retopoflow

hey i have a quick question about retopoflow could it be used to make models based of back ground images because everytime i see someone use it, it is used over a premade model?

Retopoflow is built to use an existing model. It is intended to create new topology quickly and easily, and it does that by having the existing geometry to work from.

shame it looked like it could be used to build a more perfect model