Yeah pretty much. As and when really. Apparently you are supposed to change wipers every 6 months or something stupid like that, but there is not a need for that. As long as you clean your car regularly, clean the debris out of the wipers and maintain the wiper blades, you should only change them when they smear or insufficiently clear the screen.
I removed the little stickers off mine as they started to turn to yellow after about a week so that would mean changing the blades every month. Pretty useless in my opinion.