Cartograph 2 Lite Map Viewer
The Cartograph Lite app views Mapsforge offline vector maps, offline raster maps, and online/WMS maps. It supports tracking, route search, overlays, hillshading, reliefs, track drawing, and has many other features. Pro-version: https://itunes.apple.com/us/app/cartograph-2-maps/id1082995961?ls=1&mt=