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There’s something satisfying about getting immediate feedback about exercise, sleep, and other activities. That’s why more and more people are joining the “quantified-self� movement. It involves formal tracking of health and habits, usually using apps and devices that feed data to them—from heart rate, activity, and sleep monitors to Bluetooth connected scales. I haven’t yet become a full-fledged member, partly because having so many apps and connected devices on the market makes it hard to decide which ones are worth trying.

I’m hoping that will help. This website, launched by the Harvard-affiliated , aims to give people like me impartial information about fitness trackers, mobile health apps, and other self-help technologies.

Wellocracy lists dozens of sleep trackers, wearable activity trackers, mobile running apps, and mobile pedometer apps, each with a mini-review and a “what we wish it had� listing. The site lets you compare apps and devices in each of the four categories. The compare feature isn’t yet as helpful as those from Consumer Health Reports, but that may be coming.

The site also provides , and offers throughout the day.

“There are millions of people struggling to eat well, exercise, manage a chronic disease or decrease other health risks. Wellocracy will help them select and use digital health tools, understand their individual motivations, and make incremental lifestyle changes that can easily be incorporated into busy schedules,� said Wellocracy founder, Dr. Joseph C. Kvedar, an associate professor at Harvard Medical School.

One theme the site promotes is “stickiness.� That means finding motivational strategies, apps, and devices that help you stay on track to achieve your goals. You can .

Maybe the information on Wellocracy is enough to nudge me from contemplation to action.