Yes it is a computer based program. It provides workouts and training plans. It guides you through each sessions with power targets at specific times during the workout. It also integrates with sufferfest videos. It is $10/month and seems to be very popular here.
I was just letting you know that if you are going to use trainer road then a Kurt Kinetic is really not necessary because the Trainer Road provides relatively good virtual power. That being said the KK power has reviewed well. It is fairly accurate when calibrated. I encourage you to read DC Rainmaker's Kinetic In ride Review. It provides a detailed reviewed of the KK powers. I talso gives an overview of Trainer Road.