Numbers you can argue with.

VIGR never invents a number. Scores appear only when real data supports them; missing values stay visibly unknown instead of becoming zeros; and a food item with no real nutrition data can't be logged at all. When the app is unsure, it says so.

Your readiness score is computed from six inputs: last night's sleep, heart-rate variability (HRV), resting heart rate, accumulated sleep debt, training load, and daily activity — with HRV and resting heart rate compared against your own recent baseline, not population averages.

Sleep, HRV and resting heart rate are the measured signals: with all three, confidence is high; with less, the ring dims, names what's missing, or shows no score at all. Each morning a score locks in as your anchor for the day — training can pull it down and recovery can bring it back.

A 0-100 score built from three pillars. Nutrition measures what you logged against your own calorie target. Exercise blends your active minutes against your weekly goal with steps and energy against standard reference points — weighted across your recent week, so a rest day doesn't erase a strong week. Recovery blends sleep, HRV and resting heart rate against your own baselines with the recovery work you log. The score updates as you log.

The coach only speaks from your data. It stays silent until you've logged something real, won't make a "this week" claim without at least two days of evidence, and when a signal is missing, anything that depends on it simply doesn't fire. No data, no message — not a guess.

Nutrition data comes from real sources first: Open Food Facts for barcodes, USDA, Edamam and Nutritionix, plus VIGR's curated database. AI vision identifies what's on your plate and estimates portions; AI nutrition estimation is a clearly-scoped last resort for foods no database knows. Every AI-adjacent result passes a coherence check — if the macros don't add up to the calories, you're warned — and an item with no real nutrition data cannot be logged.

You and up to five friends, each shown as colored circles per pillar: the average of real daily scores over 7 or 30 days. Green is 70 and up, yellow 45-69, red below — and grey means fewer than three scored days, because an average of nothing isn't an average. Boosts are human encouragement, never score multipliers: one per person per day, and the message never reveals which kind was sent or what their circles look like.