The Fitbit looks pretty close. I don't think it's perfect, but it's directionally correct. I feel like for a lot of self improvement frameworks it's about dire

The Fitbit looks pretty close. I don't think it's perfect, but it's directionally correct. I feel like for a lot of self improvement frameworks it's about direction not accuracy. Like for example, body fat % machines vary greatly, but surely being closer to the 10-20% range is better than 30-40% range regardless of the method you use. Probably the same can be said for sleep.