Theres a new(ish) gps app named Australia Topo Maps by Atlogis. It includes access to Tasmania LIST maps, NSW Six maps, Queensland QTopo maps, Australia NatMap maps, OpenCycleMap as well as other topo maps and imagery. The maps are selected by tapping a box in a menu. No Urls required to be entered. Its free but has adverts, and theres a paid version that allows areas of maps to be downloaded for offline use. The maps in the free version can be used off-line if the area of interest is viewed at the required zoom level. The map tiles are stored in a cache which is then accessed when offline. It can record tracks and waypoints which can be uploaded to a computer etc. The paid version allows tracks etc to be downloaded to the app. Its simple to use compared to some other gps apps. Zooming in on a map is a bit unusual. Apart from the zoom button on the map, theres a zoom setting in Settings (top left) > Preferences > Map > Scaling. There doesnt seem to be any limitation to the size of the map tile cache. This may be coming in a future update, or the limit might be unspecified. Presumably the folders and files can be deleted manually if its taking too much storage space.
https://play.google.com/store/apps/deta ... alia&hl=en