Originally Posted by IOWA
That's what I'm sayin' lol. It's a gimmicky thing. But I guess now we're going to have to sqeeze and accelerometer, gyroscope, compass, gps, and heat seeking radar missles to phones now.
It's not easy to explain but basically, a gyroscope is much more accurate because it detects your rotational movements instantaneously and accurately.
An accelerometer does the same thing, however, with one major exception. I'll give an example to explain. Imagine you are standing still and using an app that is using the gyroscope/accelerometer. If you suddenly start walking your rotational movements will be incorrectly processed.
Maybe not the best example, but the precision of the accelerormeter is compromised by gravity, unlike the gyroscope.
Finally, there is a reason helicopters use gyros and not accelerometers, because they need that much instantaneous precision.