MeTogether is a service and application to prevent sex crimes. Lack of clarity about the law, a sense of shame, or fear of being criticized sometimes stop victims from reporting an incident. MeTogether prevents sex crime by eliminating these problems and raising the report rate. MeTooTest diagnoses the cognitive level of the sex crime so that it can be accurately assessed. MeTooCall protects the victim's identity by making the receiver private. MeTooMap helps victims share with others anonymously about the incident to create a local safety net. A pilot operation shows about 90% of the residents were willing to use this service.