I've installed one of the free Android ones and will try it if I remember. As an adult I don't get driven around very often any more, so it's easy to forget I get motion sickness. So far I've got it from cars, buses and boats, but never trains or aeroplanes. I've noticed I'm far more susceptible to it when I'm tired and/or hungry (which probably means low blood sugar or something), to the extent that even the best driver in the world will make me sick in such a state.