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The boundary

Vayl reads. The reading is yours.

A tool that hands you a verdict makes you stop looking at the data that produced it. So this one does not. Below is the whole contract, stated plainly, so you never have to guess where the line sits.

Always

  • Show the raw value and its unit
  • Put what you took next to what your body did
  • Leave missing days unmeasured
  • Let you export logs as CSV or JSON

Never

  • Tell you what to take
  • Score your body, or rank you against anyone
  • Pass estimates off as readings
  • Sell your data, or train anything on it

If you want guidance, hire a coach. If you want a clinical opinion, see your doctor. Export your logs as CSV or JSON to show whoever you choose.