We mentioned earlier that we were interested in doing a side-by-side comparison of the Jawbone UP’s sleep analysis and that done by the Sleep Cycle iPhone app. Well, user alexw at the official UP forum beat us to the punch with a sample one-day analysis. As expected, because the UP is attached to you, it’s accuracy is better than Sleep Cycle, which relies on the iPhone sitting on the corner of your bed.
Another user compared the UP to another body-mounted device, and the results were very similar. It sounds like the UP’s sleep analysis will be a much better log of sleep activity than what Sleep Cycle offers, so the UP is definitely an upgrade. The downside at the moment is that several users have noted bugs in the sleep analysis display, which at least for one night, didn’t show up at all in the detailed, landscape-based mode. Jawbone has already released an update for the UP, which is a good start, but on our end, the logged sleep from last night remains missing. Hopefully the update ensures that future logged nights display correctly.