How accurate are these sleep tracker devices?

Discussion in 'iPhone Accessories' started by yalag, Jul 16, 2013.

  1. yalag macrumors 65816

    Nov 18, 2007
    I'm looking into buying a wearable device (something like the Jawbone UP or Fibit flex) that allows me to track my sleep. I'm interested in getting as accurate data as possible as I don't have good sleep. Does anyone know how good these devices are at tracking and which brand has it best?
  2. darster Suspended

    Aug 25, 2011
    Not very good. They base it on movement, which is not very good at telling you how good a sleep you had. You need something to track your REM sleep, etc, which can only be done by tracking your brain waves.

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