I hope they'll make a desktop web version of this app, because planning everything (what you want to see, where you want to eat, etc.) on a small screen is tedious. For all my previous trips I have used Google My Maps [0], which is good but not great: on mobile, the places you added to your layers don't contain any Google Maps information, such as opening hours, and you even need to have data to get the name of a pla…
However, HERE Maps allows for you to do an offline download of the maps, and that includes building names, addresses, routing/driving, and train schedules (non-live).