Art you can mostly do as you want with (you are free to sell it and do what ever) as long as you just use the OSM data, it's only if you are trying to add comme

Art you can mostly do as you want with (you are free to sell it and do what ever) as long as you just use the OSM data, it's only if you are trying to add commericial data to the mix that you can get in trouble. I do not think there should be any problems.