RapidFTR is a versatile open-source mobile phone application and data storage system that seeks to expedite the process of reuniting by helping humanitarian workers collect, sort and share information about unaccompanied and separated children in emergency situations so they can be registered for care services and reunited with their families. RapidFTR is specifically designed to streamline and speed up Family Tracing and Reunification (FTR) efforts both in the immediate aftermath of a crisis and during ongoing recovery efforts.