Fitbit Charge HR
Fitbit is our favorite dedicated activity tracker and, at $150, the Fitbit Charge HR hits the sweet spot of all Fitbit wearables. It provides more features, including an optical heart rate monitor, than Flex or Charge. But it's not as bulky or expensive as Fitbit Surge ($250), the company's super-duper sports watch.
Fitbit Charge HR automatically monitors your heart rate throughout the day and night; automatically tracks your sleep; displays caller ID info (when paired with your smartphone); and offers exercise tracking. Plus, it now comes in five colors. Downside: Charge HR needs recharging about every two days, in our experience.
While Fitbit Charge HR won't improve your work productivity per se, it will help keep you active. The Fitbit leaderboard, viewed in the Fitbit mobile app, is a huge motivator, too, because you can see how many steps friends and family members have taken so far this week (provided they opt-in to sharing that info, of course).