If nothing else, it's an automatic log. Combined with other apps that monitor your health, you have access to a more complete picture of you. And if you're on the difficult journey of going from unhealthy to getting in shape, the more evidence you see that your overall health is improving is additional motivation to keep at it.Can you briefly explain what there is to figure out?
When I don't sleep well it's pretty easy to figure out why; did not exercise enough, problems at work, did not meditate before sleep, eat too much sugar/caffeine before bed, family, etc. In most cases a watch is not going to know why I did not sleep well!