Citizen aid Great app but to be read & prepared before an emergency arrises, if you want to read it when the emergency is happening be prepared for it to freeze your phone, so if you want to remain hidden & quiet it wouldn't be any good because the only way to get it off the screen is to turn off your phone & back on again which then you get the start up tune on your phone starting. This could in turn delay a 999 call. Like I said you need to read & remember the great advice in this app BEFORE an emergency happens. Well done!!