I have personally used the following trackers/apps at various stages of my fitness journey as have many of my busy, driven lawyer clients both pre- and during the pandemic. They all track specific data across movement, nutrition, recovery and body composition and present the data in ways that inspire action/change. No tracker is perfect. Perfect doesn't exist. But they are pretty darn good and that's better than guessing. I often joke that I wish they would all merge so we could have one mega tracker that did it all (MY PRECIOUS!). And yes, I have been known to sometimes wear two at the same time because, frankly, I'm a crazy person.