I think that app is fantastic, but one item missing

I think that app is fantastic, but one item missing from all the apps is choosing the route based upon the live cost and availability, with a weighting on the cost over the delay.

I don't care for the brand, nor do I mind waiting 20mins to relax for half hour for the charge. However money is a rare commodity. Prioritisation of free, 30p, 50p or between 0 and 50p, or avoiding those > 50p would be welcomed by most people.