"android" wrote

| Do your iPhone have a gyroscope? If not then it's obsolete for pinpoint
| accuracy navigation!

Don't allow cellphones have a gyroscope if they allow
for changing orientation? And why is that needed
for altitude? I assumed the iPhone was calling some
service that uses the cell towers (or satellite?) for
the data.

But you know more than I do. I don't use an iPhone
and can't imagine caring about altitude data for photos.
As I said, this was not my phone. It was a friend taking
pictures with an iPhone 6. Have you tested with your
own phone for altitude accuracy?