This appears to be the only iPad / NordicTrac Pro use review, so be advised that the default, free, snow road course is ideal and the calibration works fine! The magnetic cover can be duct taped to the handgrip extension just above the handlebars and the programmed inverted screen is ideal for this so the iPad can just snap in securely.
The mph is twice the kph on the Nordic track monitor, so about 4 X, but who cares?
To cut to the chase, my workout is easily 2X as intense and WAY more fun. The design and execution is SOOO clever. I was considering building an interface using the flywheel sensor, but the vibration sensing system is inspired! Get this app!