Fitbit is one of the longest-staying fitness apps in the market. This fitness app has only grown stronger through the years. It has step counters, provides calorie-burn calculations, heart rate monitoring, and more. The makers of this app have products that suit every lifestyle and age (yes, there's a Fitbit for kids too). Also there is something that will suit your needs if you love taking advantage of the great outdoors in order to stay fit or use the gym.
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