Attempt (isolated nap): failure

Sleep graph:
Spoiler for *:

Okay, I noticed this at first, but am wondering more about it now. Why are the sleep graph's in my app more volatile than those from the official app? (ie, more numerous and thinner slices)

It's possible it's because of the sound prompts changing my sleeping patterns, but it's also possible I got something wrong and that's reducing the accuracy of the sleep-stage calculation. I'm going to investigate it more, to make sure the latter is not the case. (it's also possible I'm just polling it too frequently or something like that)

Success rate:
Long sleep: 2/2(+1 interrupted) (1 weak, 1 full)
Post-sleep nap: 1/1 (0 weak, 1 full)
Isolated nap: 1/2 (0 weak, 1 full)