MAPS.ME is a handy little mapping application for smartphones that I have been using recently in Australia and overseas for travelling generally and also for bushwalking. I encourage you to have a look. All you need to do is download the free App from the Google or Apple stores on your smartphone, load the maps (Open Source Maps) you need for your trip, and all the features work in offline/airplane mode. You will always know exactly where you are with no mobile network needed. It allows you to find a route to where you want to go, add a bookmark to a map, search for places of interest such as shops, transport and accommodation, and even allow you make a booking in some cases.
It is also very handy for bushwalking. While it is NOT a full GPS and the maps are not topographical, it can easily load waypoints as well as walking tracks, and display places of interest. It uses only KML Format which is used by Google Maps and Google Earth (an equivalent of the GPX format used by GPS manufacturers). Just send yourself an email with the KML file attached, open it on your phone, and MAPS.ME automatically uploads the data ready for use.
You can easily convert a GPX file from your GPS device, from the internet or from your club's Leaders Database to KML format using the website www.gpx2kml.com (also free).
For Victoria it has most of the 4WD tracks, dirt roads and many of the more popular walking tracks on its maps. For example, around Walhalla and Warburton, the Great South Western Walk, Great Ocean Walk, the Walk into History Track. The smartphone screen is a pleasant change from even the latest GPSs. The only problem is it won't tell you how far you have travelled. Smartphone Apps and a GPS are great bushwalking complements but are not substitutes for a real map. Maps don't break or have batteries to go flat!.
Mick Noonan, The News of the Melbourne Bushwalkers Inc, February 2017