I don&#x27;t know why they don&#x27;t just use the data that is already being collected - <a href="https:&#x2F;&#x2F;jawbone.com&#x2F;blog&#x2F;circadian-rhythm&#x2F;" rel="nofollow">https:&#x2F;&#x2F;jawbone.com&#x2F;blog&#x2F;circadian-rhythm&#x2F;</a>