Maybe you know. I've been told twice that OSMand can show the altitude above sea level of a location, but I cannot for the life of me figure out how. Have you any idea?
- go to pugins section and activate the contour lines plugin
- then go to download maps and load the contour lines data for your region
- go to configure map and check the show contour lines option
I think you need the f-droid Version or the paid pro Playstore version or the subscription. Please note that this will only show marked contour lines and not interpolate/estimate the elevation for any point. So you need to search for the next line and get your own idea what that means for the specific location. Not ideal for very flat areas with sparse contour lines.
For the current position you can show GPS elevation (settings, configure screen, widgets)
On iOS, I have mine configured to show the altitude in the top right corner of the map view. The settings are admittedly confusing but if you just poke around in the map display settings you should find it!
Thanks!