Five-O is a mobile application created by three African-American siblings from Georgia, USA. The three, Ima, Asha, and Caleb Christian, aged 16, 15, and 14 respectively, in 2014, created the application as an attempt to provide a solution to the issues generated from interaction between law enforcement and citizens, such as the shooting of Michael Brown, and their own traumatic experience with two police officers. The application was launched on 18 August 2014. The application is available on both Android and iOS platforms, and has been developed in collaboration with Pinetart Inc., a company developing mobile applications they have founded. The term Five-O is American slang for law enforcement, based on Hawaii Five-O, a television programme.