Sorry! I should’ve clarified. Android is key, but iOS also is a bonus. Things 3? Is it FOSS? I couldn’t tell, but it wasn’t obvious. Thanks for the suggestion.

I use and love Joplin. It seems like for this use case, it’d be a step better than a spreadsheet. I want something that’s more like tap a button and add a name if necessary. Great suggestion, though. Thanks!

I’ve messed with owntracks. It’s awesome, but more complex than what I’m looking for. Great software, though. Thanks for the idea.

Working source: https://github.com/SimpleMobileTools/General-Discussion/issues/241