Mission Manager - Situational Awareness Tool
Written by people who have years of experience running real missions and managing emergency personnel.
Currently used by Sheriff, Fire and Police Departments, Hospitals, SAR/USAR Teams, Animal Rescue, Schools, Emergency Operation Centers, Civil Air Patrol and more.
Also features - amongst many other things - direct entry of USNG coordinates for multi-layer map (thus now the second map app that I have found to be able to do so). Truly enjoy using it since it's intuitive and thus easy to use.