FEATURE
One place for your meals, macros, and weight.
Calorie tracking tells you what went in. Weight tracking tells you what happened. Calorie.one keeps both on the same screen because neither number means much alone — together they form the feedback loop that actually makes a calorie target work.
INPUT · CALORIES
Log meals as a sentence or a photo. AI decomposes them into ingredient lines priced from USDA FoodData Central, with a source label on every line. Your day runs as a ledger against a daily budget, macros included.
OUTPUT · WEIGHT
Two-tap weigh-ins with a trend chart that smooths daily water noise. A quick-log card sits on the dashboard itself, so the morning weigh-in and the day's food live one glance apart.
THE LOOP
Why one app beats two
Every calorie target starts as an estimate — TDEE formulas carry a ±10–15% error for individuals, often a few hundred kcal per day. The correction mechanism is simple: compare your logged intake to your weight trend over two to three weeks. Flat trend at 2,200 kcal/day means 2,200 is your real maintenance, whatever the formula said. That comparison is the entire method — and it only happens reliably when both logs share one screen. Split across two apps, the loop depends on you running the correlation in your head, every week, forever.
The arithmetic behind the loop — 7,700 kcal per kilogram, reading weekly averages instead of daily noise — is worked through in the case for tracking weight and calories in one place.
GROUNDED
Both numbers you can trust
An integrated tracker is only as good as its inputs. The calorie side is grounded in USDA FoodData Central — lab-analyzed, public-domain records, matched per ingredient and labeled per line. The weight side is smoothed into a trend so a salty dinner can't masquerade as fat gain. And if you want a starting target, the free calorie calculator computes your BMR and TDEE with the Mifflin-St Jeor equation — no account needed.
FAQ
Frequently asked questions
- Is Calorie.one an all-in-one weight and calorie tracker?
- Yes. Food logging (by text or photo), macro tracking, and weight tracking with a trend chart live in one app on one dashboard — with a quick weigh-in card next to the food ledger, so intake and outcome are always read together.
- Why should weight and calories be tracked in the same app?
- Because each one calibrates the other. Your weight trend over 2–3 weeks reveals whether your logged intake is actually a deficit for your body — TDEE formulas carry a ±10–15% individual error. When both numbers share a screen, the comparison happens automatically instead of never.
- How does weight tracking work in Calorie.one?
- Log a weigh-in in two taps from the dashboard or the weight page. The chart shows your trend over time, smoothing daily water-weight noise so you read the signal — the multi-week direction — instead of this morning’s fluctuation.
- Is the weight and calorie tracker free?
- Yes — both halves are part of the free, ad-free product, along with the AI logging and the USDA-grounded breakdowns.
Close the loop
Meals, macros, and weight in one free, ad-free tracker — with numbers you can verify line by line.