https://discussions.apple.com/thread/7862243
The problem with Apple's emergency bypass feature is that there is no customizability. Even if your phone is set to silent, your emergency bypass contacts will ALWAYS go to sound. The only way to undo this is to deactivate emergency bypass for each individual contact, which is equally if not more inconvenient than the galaxy UI solution.
In fact, as linked above and mentioned before, many Apple users are actually frustrated with the emergency bypass feature BECAUSE of how absolute it is. There are times you wouldn't want your bypass contact to activate a sound ringer. Take for example, a movie theater, performing arts event, or any other sound sensitive circumstance. On iOS, if I wanted to be sure that NO ONE could reach me when it would be rude to make a noise, I would have to either A) switch off emergency bypass for all of my close contacts individually (which would be super tedious and impractical) or B) turn my phone off completely. Doesn't sound so great now, right?
Well with the solution described above, if you want everyone set to vibrate, you just set your phone to vibrate. If you're in a theater and want everyone on silent, you just set your phone to silent. If you want bypass contacts to ring with sound, set your phone to sound. Outside contacts will vibrate on sound with a "Silent" ringer as default, but if you want them to also make a sound, simply set your default to another ringer with sound. You see, there is more customizability with galaxy UI and it actually covers more bases, as long as you know how to follow "If, then" conditional statements.
The Apple emergency bypass feature has its own host of critics for the reasons described above, and it shows that each implementation of a solution has it's own distinct pros and cons, and there is no "one size fits all" approach. While you may feel having an identical emergency bypass feature would be better for you, other Apple users actually hate its silent mode bypass and would probably prefer something closer to the galaxy solution (which I personally confirmed on my father's iPhone is not possible). Coding software is notoriously tricky, and attempting to "fix" one thing often breaks many others. Because directly cloning the emergency bypass feature from iOS would lead to the issues mentioned above, I am satisfied with using some technical know-how to figure out an identical, more customizable solution myself
