spigen premium air vent magnetic car mount: is it safe

the only effect magnets can have on your device is that the compas will not work while the magnet is close

I'd give some serious thought to sticking that metal piece to a cast rather than directly to the back of your iPhone. Getting anything with even moderately strong adhesive off the back of an iPhone can do damage.

harshjn90 wrote:

But this is made for navigation purpose only ?? Just as for knowledge it uses n50 magne

The phone uses GPS for navigation, not the compass. So, whether or not the compass functions is irrelevant to this use case.

Rudgar was simply telling you that, as the only thing affected by the magnet is the compass, it's perfectly safe to use the magnetic case.

harshjn90 wrote:

Then what is use of compass ??

isn't used for navigation

The compass is moderately useful for manual navigation (you're out in the woods, you can't find the trail and you need to know which way is north so you can orient yourself to the paper map you're staring at).

The compass is NOT necessary if you are using a GPS-based navigation app such as Maps, Google Maps or Waze. GPS apps get their location information from satellites way up in the sky. The magnetic mount will NOT interfere with GPS. You CAN use a magnetic mount and GPS navigation at the same time. I'm not sure how many more ways there are to say that.