Yes but most places include 3 custom tunes with purchase price. Some will even do a live data tune if you can find one Fred at rogue used to but he's been kinda out of the loop lately. Basically that means you'd don't have to use a dyno you give him specs and he will build a basic tune file you get it in email or preloaded on the handheld when it ships. Then you flash it and drive with the handheld to record live data and then you can send the data to the tuner and have the file tweaked to fit better with your engine/driving style. Its as close to a dyno tune as you can get without the dyno costs.
New DD-2009 Ford Mustang GT/CS candy apple red.
(sold)2003 XLT Tan 3.0L V6 5-speed, Lots of mods.