VERDICT

The bracelet is comfortable to wear but doesn’t hold charge well over multiple nights – so you have to pack your charger when you’re on the move. Though I wasn’t attempting to get pregnant, it identified my peak fertility window and became more accurate over time. In addition, it gave interesting sleep data (hours slept and percentage of light sleep compared to deep and REM) and helped me track my periods. It’s a modern, more reliable version of graphing body temperature on a chart every morning like my mum did 30 years ago.