But if you have an irregular period, you'd need to take an ovulation test and input the results for a truly accurate reading.

The Xiaomi Smart Band 9 is one of the cheapest fitness trackers that's worth buying, despite some rough edges.

Not only is it sleek enough not to disturb my sleep, but it can track things my old AppleWatch never dreamed of.” ...

Outstanding functionality. Very easy instructions to sync it with smartphones. It counts steps, heart rate and sleep ...

Note: By reading this column, you consent to allow Josh Freed to track your data and laughter and sell them to anyone he ...

The Oura Ring Membership, which is required if you want to unlock the ring’s full potential, costs $5.99; you get one month ...