Certain trophy organizer do have their own mile which may deviate from the standard mileage. Would be greate to have a possibility to calibrate the app. So we don't have to calculate the distances in the roadbook to the measured mileage.
3prally seems to be designed for TSD rally. 3pmaster seems to be designed for navigation. Some navigation rallyes have a special mileage setting. So that feature would be great in 3pmaster too ;-)