Dr. Roy Walford's Interactive Diet Planner (DWIDP) software is available to supporting members of the Calorie Restriction Society. This software was developed by Dr. Roy Walford, based on his thirty years of research into Calorie Restriction. Supporting society members may download the full version of DWIPD from the Members only area.

Unfortunately, DWIDP only works on Windows XP or earlier versions. It requires additional Microsoft software to run on Windows Vista or Seven. It does not run on Macintosh or Linux operating systems. A link to appropriate software, designed by one of our members, will be sent in the "Welcome" email message sent by the Managing Director to all newly joined Supporting members.