How Your Watch Measures Stress — and Why It's Only Half Right
Your watch says “high stress,” but you feel calm—or the opposite. Discover how HRV and other sensor signals contribute to stress estimates, what can influence the results, and how to use trends as ...
How Does Sleep Tracking Actually Work? (Your Watch Can't See Your Brain)
How does your watch know you are asleep—and can it distinguish deep sleep from REM? Explore how movement and pulse patterns inform sleep estimates, why quiet wakefulness can confuse the algorithm, ...
Why Your Smartwatch's Calorie Count Is Probably Wrong？
Can you trust the calories burned on your smartwatch? Explore how devices estimate energy use, why results vary by activity and individual, and how to interpret the numbers without treating them as...
How Your Watch Knows You're Dreaming (And Why It's Probably Guessing)
You wake up, grab your phone, and there it is: a colourful bar chart of your night. Deep sleep here. REM there. A little awake time at 3 AM. Looks scientific. Looks precise. But here's the unc...
Your Watch Is Quietly Building a Digital Copy of You
Every night you sleep, your watch logs it. Every run, every restless hour, every skipped workout. Individually, those numbers feel meaningless — just another graph you scroll past. But what if all ...
Is This Perimenopause? Your Watch Might Already Know
You wake up drenched. You kick off the covers. Ten minutes later, you're freezing. You can't remember the last time you slept through the night. And your patience? Gone. Welcome to perimenopause — ...