We have a call every 1-2 weeks with a written agenda we share over email. It started off okay, but my W keeps adding more and more minutiae and they are less effective lately. Let me know if you find a good app!

We also tried google calendar for timeshare but my W didn’t take to it. So we have an email thread going with all the dates and times for various drop offs and pickups.

I don’t have any answers for you... so hard to communicate effectively. It’s all trial and error. Seems like your W also gets triggered by almost anything. (Sigh)