My first time flying with the newer app and Firmware, I no longer see the Calibrate Compass option on the Flight Status page that you get when you first start up.  It's buried deep in the advanced area I think.

Am I missing something, is there an easy to get to calibrate compass button I can use at the start of a session?

-Roger Uzun

Yes, it's been moved, probably because too many people were seeing it and thinking it was a warning rather than a button.

btw .. Why would you want to calibrate your compass at the start of a mission?
It's completely unnecessary (read P57 in your manual to see when you need to calibrate the compass) and introduces the risk of a bad calibration which would cause more problems than you think you are preventing.

Thanks @Labroides. Ditto! 80 miles after 100 trouble free flights and only 1 compass calibration.