Reviewed: Jawbone UP24 Activity Monitor Dec 17 2013


  • Possibly the best sleep tracking available today.
  • Explicit data erase process.
  • Always on Bluetooth syncing (app must be open, seems to take some prodding occasionally).
  • Excellent food logging.
  • Calibration provides greater accuracy – unique on the market.
  • New 3.0 app is excellent.


  • Proprietary charging adapter.
  • Not swim safe.
  • Not a wristwatch, no on-device alphanumeric display, only hieroglyphs.
  • Easy-to-lose charging cap.

Jawbone created a genuine hit with its original UP and in the process, helped catalyze the explosive growth we’ve seen in the activity tracking/body monitoring industry. With the introduction of the UP24, Jawbone has kept all the good things and added a few subtle, but powerful features like automatic Bluetooth syncing, a nicely updated mobile app (iOS and Android), and for anyone concerned with privacy there’s now an explicit process for deleting the data you’ve stored with Jawbone.

Attention: The internal data of table “60” is corrupted!

The UP24 is arguably the best sleep tracker on the market today – the morning summary provides more detail than any other device, highlighting periods of deep and light sleep, how many times you may have woken up and for how long, the total amount of time you were in bed, along with a running tally of your sleep totals for the past seven days. One real-world benefit of all this is my own discovery that I’m at my best when I have at least 2 hours 45 minutes of deep sleep. The problem is that I can’t exactly “make” myself achieve this goal because I’m… asleep. MotionX creates the algorithms that reside on the UP24 (and UP) for activity and sleep tracking and they’ve sharpened their work, thanks to the original UP’s success.

Attention: The internal data of table “61” is corrupted!

By adding auto-syncing via Bluetooth (the phone-based app needs to be open) the UP24 solves an important competitive deficit – Fitbit, Nike, and Withings all offer this feature. The original UP needs to be plugged into your phone’s headset jack and while that’s not much of a hassle, it’s nice to not need to do so.

In the odd category, the UP uses a 3.5mm jack while the UP24 uses a 2.5mm jack, which means you couldn’t plug the UP24 into your phone if you wanted to. Some in the Quantified Self community have discovered ways to hack the original connection and changing to a 2.5mm may be a step to stop this from happening.

The UP 3.0 mobile app provides for excellent food logging and unique in the industry, the app allows you to calibrate the band to your unique stride. Taking this step won’t guarantee precision, but it should certainly help.

Let’s see what’s going on in Data & Connectivity.