I'm SO happy! Has anyone else tried this?

I happened to mention in passing to my boyfriend that my period started, when listing all the reasons my day sucked. And he totally surprised me by asking if there's a way I can update him on my cycle status so he's more aware of my feelings/needs. So I'm looking into syncing accounts because I remember reading somewhere that that's a thing. :) Has anyone else tried that? Does it work well?