The SciFit Electronic Accessory - Fit-Key Software technology lets you create and use customized workouts on any SCIFIT product. Track your progress over time with helpful prompts and precise documentation of wattage, heart rate and other metrics. Whether you?re looking for detailed results from an individual session or big-picture trends, Fit-Key software?s friendly graphics show progress at a glance. Fit-Key makes it easy to prescribe specialized exercise programs and track compliance and improvement. Using Fit-Key software is like having a virtual trainer to monitor and motivate you for measurable improvement.