Apple's solution or hardware is just half baked. The G-forces in a crash are much higher than dancing. Other implementations are better. I carry an iPhone wh

Apple's solution or hardware is just half baked. The G-forces in a crash are much higher than dancing. Other implementations are better. I carry an iPhone when I go biking, and I have a Garmin GPS. The Garmin crash detection works far better. The Garmin is tuned well enough to go off on a real crash mountain biking but won't go off if you have an accident that's not a full fall. I have had a very "real" crash and seen the Garmin correctly identify it and the iPhone does not.