sudo beep on Nostr: If I want to stroll around and record location spots on a map of some kind, what's a ...

If I want to stroll around and record location spots on a map of some kind, what's a good mobile tool to capture in?

I don't know the field but I want to generate map data I can parse, maybe embed online etc.

I have an Android phone.

I've been jotting approximate street addresses into a markdown document so far...