Guides

Understand the metrics behind your health.

Plain-language explainers on the signals Vitora computes — recovery, sleep, and where your health data actually goes. Written for people who want to argue with the methodology, not just trust a number.

• What Is a Good HRV for Recovery? How Readiness Scores Work

  HRV alone won't tell you if you're recovered. Here's what heart rate variability actually measures, why your personal baseline beats any chart of "normal" values, and how a readiness score is built.

  6 min read →

• How to Read Apple Watch Sleep Stages (and What a Sleep Score Means)

  Apple Watch reports Awake, REM, Core, and Deep sleep. Here's what each stage does, how the Watch estimates them, how accurate that is, and how those stages become a single sleep score.

  6 min read →

• On-Device vs Cloud Health Apps: Where Does Your Data Go?

  "Private" is the most abused word in health apps. Here's what on-device processing really means, the three ways health apps leak data, and the questions to ask before you trust one with your body's numbers.

  6 min read →