The Refuel Score is a number between 0 and 100 that describes how much reserve you reported having today. It comes from your check-in: mood, energy, sleep, whether you asked for help. Nothing else.
Deterministic, on purpose
No model guesses the score. The same answers always produce the same number, and the app shows which signals weighed most. If it moved since yesterday, What Changed tells you why in one sentence.
Not a goal
It is tempting to treat any number as something to raise. Please do not. A low score after a short night is the score doing its job. The point is to understand what you have left today, and choose one thing that fits it.
Your baseline
Over a few weeks the app learns what steady looks like for you, so a 60 is read against your own rhythm, not a population. Until then it says so: we are learning your rhythm.
Self-reported, so it can be imprecise. Not a medical assessment or diagnosis.