Hi Christopher.
You will get some pitch and yaw data since that is recorded relative to the position of the device when you “calibrate” it – but if the phone/tablet is not mounted in the mid-line of the boat, the data may be skewed.
An alternative may be to run RaceQs on a phone which you can put out of the way below (next to the keel for example) for tracking and use your tablet for the race software such as iRegatta which is more optimised for tablet displays and easier to read in sunlight.
Regards
Paul