Fitbit Inspire 2 Health & Fitness Tracker has everything that you need to be healthy and fit. You can track the entire day's activity via this single Health & Fitness Tracker. You can keep track of your heartbeat as well, it warns you if it detects any sort of unnormal heartbeat so you can prevent uncertainty by consulting a doctor. You can track deep and REM sleep via this watch as well, by which you will get to know your actual hours of deep sleep. You can wear it while swimming as well to know how many calories you burned; it will not get spoiled by water as it's waterproof. The best part about this Fitness Tracker is that it lasts up to 10 days on a single charge. overall, this Fitbit Inspire 2 Health & Fitness Tracker is the best.