About NutrientOS

Why it exists

Most tracking apps optimise for one number. You hit the number, you close the app, and nothing you learned survives the day. But the number does not explain why you were starving by 4pm, why a month of adherence produced no change, or why a diet that looked fine on paper left you short on half a dozen nutrients.

NutrientOS was built around the idea that the interesting information is one layer down: what the food contained, how processed it was, how long it held you, and what was happening in your training and sleep at the same time. Those things are already implied by what you log. They just usually get discarded.

What NutrientOS is

• •A food diary with search, barcode scanning, recipes, restaurant menus, and photo-assisted logging.
• •A macro and micronutrient tracker that distinguishes unmeasured data from genuine zeroes.
• •A set of informational signals — Food Grade, satiety, estimated glycemic impact — with their reasoning shown.
• •A place where training, sleep, hydration, and body measurements sit next to nutrition instead of in other apps.

What NutrientOS is not

• •Not a medical device or clinical tool. It does not diagnose, treat, or screen for anything, and its outputs are not clinical results.
• •Not a source of dietary or medical advice. It reports and estimates. Decisions about your health belong to you and to qualified professionals.
• •Not clinically validated. No claim is made that its scores predict any health outcome, and no such study is being implied.
• •Not a coach. It does not know your injury history, your competitive calendar, or your life.

On accuracy

Every number in nutrition tracking is an estimate stacked on other estimates. Database values are representative rather than specific to your food, portions are usually estimated, energy-expenditure formulas are population averages, and photo-based estimation is the loosest link in the chain.

NutrientOS deals with that by being explicit rather than confident: estimates are labelled as estimates, unmeasured data is shown as unknown, and scores come with the reasons behind them. Consistency over weeks is what makes tracking useful — not precision on any single entry.

A note on the name

NutrientOS was previously released as Atlas Health AI. Some long-lived technical identifiers — app store listings, bundle identifiers, and deep-link schemes — still carry the older name, because changing them would break existing installations for no user benefit. The product, the brand, and everything user-facing are NutrientOS.