Have started doing some "smart-trainer" stuff and need to track Resting Heart Rate to get a feel for whether I'm under the weather, overtraining or just being lazy. Chest straps are too uncomfortable to wear all night, every night, so I bought a Fitbit Charge HR, used only at night just to get the RHR. It was doing this, although a bit awkwardly since it divides each day between midnight-to-midnight and reports any day's reading as the average of a.m. (values collected from last midnight to waking) and p.m. (values from going to sleep until midnight). I'd have preferred it to record values straight through from going to bed until getting up the next day.
But my Fitbit has now broken/stopped irrevocably and I'm looking for some better kit. As far as I can tell, many "activity trackers" will advertise "sleep analysis", telling me how long my deep and REM sleep periods and awake time are, but not necessarily the RHR.
Does anyone have any suggestions for some decent kit, wrist-strap based, that will do what I need?