When you click on "Show All Data" you get the lowest (RHR) and highest HR for each day.
Here's the "yeah but"... It pulls the lowest, but it is still just dumping data, not presenting information. And, the pool of readings it has is spaced every 10 minutes versus continuous, so the AW has little ability to filter anomalous readings. I frequently see aberration readings on the AW. For example, when I start a run in cold weather, it often reads very low HR (low 40s) for a bit until it stabilizes. And the same with indoor bicycling workouts-- it shows HR in the 40s for a few minutes sometimes. The thing FB claims is that it looks at HR during sleep, immediately after waking, and through the day to develop an estimated HR.
By searching and looking for it in your raw data, I mean that you have to see when the Heath app grabbed a low HR, and you have to decide for yourself if it is a real reading. Also, most people do not sleep with their AW; therefore the AW would not capture HR shortly after waking like other products.
Scroll down through your detail data, and find the lows it reported. On mine, I found the lows, and there were much higher readings on either side of it. That could mean that the lows were real or an aberration. But, given that the two immediate readings were more than 40 BPM higher, I bet on aberration. When i see a couple back-to-back low readings on the AW raw data, I am more inclined to trust that those are in the area of my low. But, I would rather have intelligent software analyze that for me.
Here is an example of a likely bogus HR reading in my data: