[mlennox]

I use https://www.evernote.com

Allows you group notes and add tags, all I need.

The free version allows installation/use on two devices - phone and chrome for me.

It has two-factor authentication which is a plus.

Some folks don't like the new web ui, it doesn't bother me enough to jump ship, because while I use it regularly (the mobile app) I don't have complex requirements, just note taking, tagging. I can do that whenever inspiration strikes me and then come back and flesh out the idea when I'm at my laptop.