How many people can use Body Tracker?

Body Tracker can have an unlimited number of users on a single computer.

What are the product requirements?

Windows 2000/NT/XP/7 or greater

Hard disk with at least 20 MB free disk space

How often should I test my body fat percentage?

That depends on what you're trying to accomplish. If you're happy with your current body fat percentage, a test every month or so will tell you if you're maintaining it. If you're trying to lose body fat, however, you should test yourself every week to make sure you're losing fat, not muscle. Daily body fat tests aren't necessary simply because fat doesn't disappear overnight.