[cloverich]

It helps even if not actually using your phone, and for all kinds of motion.

(am highly succeptible to motion sickness, i generally have the feature on at all times).

[RandallBrown]

How does it help if you aren't using the phone?

[cloverich]

Getting sick from eg reading while driving is what it intends to protect. But you can use it without really using your phone, like staring at a blank screen, ie not "using" your phone in the typical sense. For people that get sick from motion more generally, as opposed to sick while reading and moving, which is far more common.