Your email address will never leave my computer. It will never be rented out or sold.
From time to time I do send out emails to people who have tried Weight Commander. I do this when there is a newer version or feature that I think might make the program more useful. And sometimes I send out tips that I think make losing weight easier. But any email correspondence from me always contains a link at the bottom to stop all future emails from me. Two clicks and that's the end of it.