Yes, this is a tuner. Anything that changes the stock settings on your truck is considered a tuner. They're just saying that they leave no signs that you've tuned your truck through the ECM. I'm sure there is something in there if you were to dig deep enough into the ECM. Biggest issue is; if a code were to be tripped while running the program and you needed to go to the dealer for the issue. Your truck, your choice to take the risk!
Edit: What is the issue that you were looking at them? Just drive the truck like "you stole it". My lowly 2014 Tradesman does everything I've asked it to do, and that's with the 68RFE! If you don't seem to have the "gitty up" that you like, do a trans relearn to adjust how you press and the accelerator. I don't got WOT, but do push the RPMs to 2500 upon acceleration if needed.