For my idea it's pretty simple. It's a crime detection app. This will let us know if any crime is happening around us presently but keeps the parties involved anonymous or ones that have happened in the past. This could be useful if someone is travelling to a new place and doesn't know anything about it. This will let them know if the area they are living in is safe or dangerous. This app should be run with police as they encounter all of the crimes at a certain place. Maybe it could be run by people but verifying the authenticity of crimes reported could be hard.