SomeAmateur

For having a dedicated topo setup I would recommend OSMand. CoMaps/OrganicMaps does contour lines too but you can configure things way more in OSMand and it makes a huge difference. I have both apps so here are screenshots of the same place to compare

If you don’t want to use a phone because of privacy concerns there are also stand alone meshtastic devices with blackberry style keyboards too

OSMand seems kinda clunky but it lets you do more stuff to really customize it if you want but I still find myself getting lost in the menus sometimes. But I like it for hiking/outdoorsy stuff

Organic Maps/Comaps is slick and smooth and really easy to use for most everyday stuff we’d use Google Maps for

Other people have mentioned it but one of the best things you can do is a little mapping of your local area on OpenStreetMap. Try to include the places you go to the most, or at least making notes so other know what needs added. That makes any app or service that uses it better for yourself and others around you

It’s not surrounded by a ton of corporate bs. I know the us govt has their own openstreetmap setups (like this basic unclassified one) and wiki sites (intellipedia) because it’s a proven framework to set up and add your own information.

gps too

Meshtastic is cool I wish there were more public users around me.

OpenStreetMap and their editors are great and I use them a lot, but if you really want to have great flexibility with your map design QGIS is Open Source

Here’s a video on how to use it

You can use CalTopo’s print pdf to print that OSM data too