[DefineOutside]

I find my Apple Watch information useful. I don't remember when I fell asleep but my apple watch does. This keeps me honest about going to be too late.

Additionally, when I first got it, I found that I was only getting 40 minutes of deep sleep which is why I was always somewhat tired. After adding magnesium to my diet I am getting around 70 minutes of deep sleep. I wouldn't have been able to pinpoint this without the data. The apple watch is the best sleep tracker [1] so your data might be too noisy to find results.

[1] https://youtu.be/LPqtfC70QTU?si=6tTayfNCkcJwDayW&t=12m30s

[greymalik]

Does Watch accurately capture when you fell asleep, as opposed to when you lay down and stopped moving?

[DefineOutside]

Not that well. You have to extrapolate from when the first first deep sleep occurs in comparison to other nights.