To work properly on an iPhone, the “Location” setting should be set to “Always” on your iPhone. This allows the app to work correctly in the background.
Note that even with this set to “Always Allow”, My Safety Buddy can only track your location while you are signed in to My Safety Buddy.
Depending on your iPhone and iOS version, you may not be given the option to select “Always” during installation.
If this is the case, navigate to Settings > Privacy > Location Services > MSB then select “Always”.