3 articles
Condition & Recovery
How the daily Condition Score is graded against your own baseline, and what HRV, resting heart rate, and the morning Check-In each contribute.
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- Wearables & Privacy How Apple Health syncing works Grio reads Apple Health one way and never writes to it. Here is what syncs, when it refreshes, and why some data appears later than you expect.
- Condition & Recovery How the Condition Score is calculated Condition Score grades today's body evidence against your own recent baseline on a 0–100 scale. Here is what goes in and what it will not claim.
- Missions & Habits How the coach decides which mission to propose What a mission actually is, the two moments Grio may create one without asking, and the rules that keep every other change a proposal you approve.
- Stress & Physiological Load How the intraday Stress Level is measured Stress Level is a 0–100 physiological estimate over five-minute intervals, graded against your own calm baseline. It is not a reading of how you feel.
- Nutrition & Food Quality How photo meal logging estimates your nutrition What happens between the shutter and the saved meal: recognition, portion estimation, and the four places uncertainty enters the number.
- Sleep Sleep stages, efficiency, and what a wearable can actually measure What deep, REM, and core sleep mean, how accurately a wrist device can label them, and which parts of your night Grio's scoring actually uses.
- Strain & Activity How Daily Strain and the Target Strain Zone are calculated Daily Strain is an absolute 0–100% reading of the cardiovascular and muscular load your day actually produced. Here is how it is built and targeted.
- Wearables & Privacy What Grio sends to AI providers, and what stays on your phone Third-party AI sharing is gated at the provider boundary, not at each screen. Raw sensor samples never leave the device, and revocation is enforced server-side.
- Missions & Habits Diary Tags and how patterns are found in them Yes/No, counter, and 1–5 scale tags are chosen to match how people actually remember things, paired against the next day's condition without claiming causation.
- Nutrition & Food Quality How the Food Quality score reads a day of eating Food Quality grades composition per 1,000 kcal across eleven contributors: six you want more of, five you want less of, independently of your calorie target.
- Strain & Activity Heart-rate zones and how intensity becomes strain Zones 1–5 are a session-detail view computed on your phone. Strain uses the same heart-rate reserve, but accumulates it as impulse rather than zone time.
- Condition & Recovery How HRV and resting heart rate affect recovery What Grio does with heart-rate variability and resting heart rate, why both are graded against your own baseline, and when a change is worth a message.
- Stress & Physiological Load Physiological Load episodes and High Stress alerts When sustained elevated heart rate during low activity is worth a message, and the deliberately conservative rules that stop it from crying wolf.
- Sleep Sleep debt, readiness, and what Grio does instead Grio keeps no sleep-debt counter and publishes no readiness score. Here is what it tracks instead, and why the difference is deliberate.
- Condition & Recovery How the morning Check-In works with wearable data The Condition Check-In is not a survey Grio ignores. It is a scored contributor that can carry the whole Condition Score when sensors have nothing.
- Nutrition & Food Quality How the three hero rings and your daily targets work The home hero is Calories, Condition, and Mission: three equal rings. Here is what fills each one and how your calorie and macro targets are derived.
- Wearables & Privacy How do I share Grio cards and photo stories? Turn your records into a card or place up to four data stickers on a photo, then save, copy, share, or send it to Instagram Stories.
- Strain & Activity Strain without a smartwatch, from phone steps When no watch covered the day, Grio observes movement from your phone's step count instead of leaving Daily Strain permanently blank.
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3 articles
Strain & Activity
What the 0–100% Daily Strain reading measures, how a Target Strain Zone is set, and what happens when you train without a watch.
3 articles
Nutrition & Food Quality
What a meal photo can and cannot estimate, how the Food Quality score reads a day of eating, and how the calorie and macro rings fill.
2 articles
Sleep
How sleep length, efficiency, timing, and stage mix reach the Condition Score — and why Grio keeps no sleep-debt counter.
2 articles
Stress & Physiological Load
How the intraday Stress Level is estimated from five-minute intervals, and what a Physiological Load episode actually observed.
2 articles
Missions & Habits
When the coach proposes a mission, how a day closes, and how mission results reach your Diary Tags.
3 articles
Wearables & Privacy
How Apple Health syncing works, what leaves your phone, and the consent gate in front of every third-party AI provider.
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