I don't think anyone else mentioned this. I use "Real Time GPS Tracker 2" on Android.

It has configurable check-in intervals and my wife can follow on her phone or online.

Set for every 10 minutes, it's not horrible on battery (I don't recall what the maximum is). It's not 100% accurate at that interval since it just connects the points with straight lines. But when I'm using this all day I'll connect it to my dyno hub or an external battery so my phone doesn't die unexpectedly.

It makes my wife more comfortable and I don't have to find a riding companion.

I think I'd probably prefer a spot tracker for a long tour, but with how infrequently I take multi-day trips this works well enough for my purposes.