Privacy preserving maps could be implemented by using mapsforge which uses OpenStreetMap vector data rendered locally similar to OsmAnd. Mapsforge files are stored in a shared directory so they can be used by multiple applications.
An example of an app that uses mapsforge is SatStat which also has an integrated downloader. If you don't wish to add an internet permission, the files could be added via drag and drop.
Privacy preserving maps could be implemented by using mapsforge which uses OpenStreetMap vector data rendered locally similar to OsmAnd. Mapsforge files are stored in a shared directory so they can be used by multiple applications.
An example of an app that uses mapsforge is SatStat which also has an integrated downloader. If you don't wish to add an internet permission, the files could be added via drag and drop.