Recs.
Updated
SpecsUpdate
Pros
Pro Highly accurate pedometer
UP24 has a very low margin of error when counting steps. For example, it won't count arm movements towards total step count as many other fitness trackers tend to do. It will be able to provide more accurate data on how many calories have been burned, duration of activity, and distance traveled.
Pro Real-time Bluetooth syncing
Bluetooth syncing removes the hassle of having to take the device off and then put it back on again multiple times throughout the day. It also allows the device to send notifications to the phone such as, "You've been sitting for an hour, time to take a walk".
Pro Integrates with an impressive list of apps
You can both import data from third-party apps and use Jawbone's data to supplement other apps. When you track your activity in a third-party app it will show up in Jawbone app's feed to give a complete overview of your fitness and health situation.
Pro Integrates with IFTTT
IFTTT (IF This Then That) is an automation app. By integrating it with UP3 you can get functionality like turning lights on in your room when you wake up, creating a chart of all your data and uploading to Google Drive, log a meal when you check in at a restaurant on Foursquare, etc. You can see a list of over a 1000 public recipes here.