Have to have a chest strap – Primal Blueprint - PrimalBeat HRV Review

I understood that hardware was required in order to use the app. I was surprised that the app can only sync with chest straps, and not wrist straps. If I really want to measure my resting HR, would it be best to be done by a device that I can wear continuously and don't have to go to much effort to initiate. Putting on a chest strap to measure resting HR first thing in the morning doesn't seem to me to be the best approach. Deleted app. My understanding is that NatureBeat does accommodate wrist monitors, so checking that next. Disappointed with this primal app.
Review by NicknameMonkey on Primal Blueprint - PrimalBeat HRV.