Quote Originally Posted by Jo A. View Post
Best offline smartphone GPS is OSMAND. No internet connection required for navigation. Just download the maps and it is ready. It also features the most detailed and updated maps since it uses openstreetmaps.org info.
and you can also help by updating the map with the roads you are familiar with. its easy to learn. so once you download the latest map, you'll have an updated one with the revisions you made.

osm philippines has an egroup. you can subscribe to talk-ph*openstreetmap.org for those who wants to learn basic mapping and on how you can improve the free and opensource philippine map