My privacy policy is simple. I have no interest in your personal data. I don’t collect it, and I don’t require any of it for you to use the app. You may optionally give the app access to your location for convenience in planning your trips, but this feature is purely optional and your location is not shared with me.
Note that the app does rely on two external Apple services, Apple Weather and Apple Maps. The locations and departure times you provide are sent to these services in order to provide forecasts and trip routes. The information sent to these services is covered by Apple’s Privacy Policy, linked here for your convenience.