Fitness watches can help a person count calories, as stated by CNet. Some examples are the Pivotal Tracker 1 and Polar M400.
The Pivotal Tracker 1 can assist in keeping track of the duration of activity, walking distance and steps taken, in addition to burned calories. The Polar M400 has a GPS feature, which can be enabled for viewing distance and pace while running. This waterproof watch can keep track of running distance and sleep, in addition to burned calories. Apple Watch, which is expected to be released in 2015, has three rings for "Exercise," "Move" and "Stand." The number of calories that were burned is shown by the "Move" ring, while the duration of brisk activity is shown by the "Exercise" ring.