How accurate are fitness trackers? Today, keeping track of your health is more within reach than ever with the widespread ...

You could score yourself a lightweight tracker like the Fitbit Luxe, a do-it-all smartwatch like the Apple Watch SE, or even a smart ring if you want something really low-profile and unintrusive.

But if you have an irregular period, you'd need to take an ovulation test and input the results for a truly accurate reading... which is kinda annoying. The Fitbit also can't track pregnancy —some ...