Hi Poider,
The compass on my iPhone worked for me, as did the inclinometer.
It got me in the ball park, from there I run the polar alignment routine on the mount to get it spot on (relative to my needs: visual and short exposure imaging). If you have a fully manual mount then I’m not sure. Most posts say getting a dedicated compass to avoid interference. There is a thread on here with instructions on creating sun dial of sorts to get accurate PA using the suns shadow:
http://www.iceinspace.com.au/forum/s...ght=Solar+noon
Regards
Hemi