Any contemporary smart phone will provide 3D views without supplemental hardware or significant battery drain.
PC based Google Earth 3D requires hardware acceleration but not the smartphone version. This is of no value when backpacking because Google Earth 3D requires a Web connection.
The following are Gaia screen images for a portion of my next backpack trip route. Note that the National Geographic Topo map has a 3D effect as standard and so adding a US Shaded Relief layer doesn’t add much of value. Conventional topo maps, like the Gaia Topo, are enhanced with a Shaded Relief layer addition. They truly become 3D. This same layering approach, to provide a 3D version, can be used for any of the Topo maps available in Gaia. All of the following images are screen shots from my iPhone.
National Geographic Topo layer + US shaded Relief layer

National Geographic Topo Layer only

Gaia Topo layer + US shaded Relief layer

Gaia Topo
