 The iPhone app provides children of all ages the ability to test their observation skills with fifty of Bob Weber Jr.'s favorite spot the differences puzzles.The now-defunct "Slylock Fox & Comics For Kids" website featured many additional Slylock mysteries that have never been printed, in addition to other activities.The site was voted an "Educational Best Bet" by USA Today and received an award for "Best of the Net" from About.com in April 1999.