The Autism Toolbox Challenging Behaviors App provides parents and professionals with strategies to manage challenging behaviors often associated with autism spectrum disorder. The app emphasizes building on strengths and respecting individual differences. The age range covered is 3 to 12 years. Twenty specific types of behavior are dealt with and include strategies for dealing with anxiety, melt downs, repetitive behavior, self-stimulation, self-abuse, pica, aggression, running, wandering, climbing, self-regulation, sleeping, and safety both at home and in the community. Following a step by step method, users can quickly generate a customized list of strategies, website links, articles, and books. They can also choose strategies specifically developed for grandparents and outside care providers such as respite workers and child sitters. Parents can attach a note along with their selected strategies with personalized instructions if someone else is going to be looking after their child. The report can be viewed on screen, saved to a pdf file for future reference, printed out in a book format and sent as an attachment to a text message, emailed, saved to iCloud, or exported to iBooks. The app is also suitable for professionals working with families with a child with autism spectrum disorder.