Antietam
Used this app for a driving tour of Antietam. It worked great! Was easy to navigate as a passenger while my husband drove but would also be pretty easy to use as a sole driver because the audio starts on its own based on GPS location (you do need to make sure to go slow enough so it doesn’t start the next one before you finish the previous one). Alternatively you can look ahead and start audio for the next stop before you pull out of the parking spot at each stop. Was great info and followed the NPS (well-marked) driving tour. Used their app for Boston Freedom Trail walking tour too and loved it!