Most apps just count calories. Lumora goes further: it models the hormones, blood sugar, insulin, fat burning and glycogen stores of every meal you eat — using coupled differential equations — and shows it to you hour by hour. It makes the invisible metabolism inside your body visible, on a clean, science-based dashboard.
The same calorie behaves very differently depending on your hormones, timing and sleep. Whether a meal goes to fat storage or becomes fuel is driven less by calories than by hormones. Lumora models exactly that — and makes it visible.
Two meals with identical calories can trigger completely different insulin and fat-burning responses. Counting only the total misses what actually happens inside.
High insulin triggers storage; when insulin falls and glucagon steps in, the body switches to burning fat. Lumora tracks that switch hour by hour.
Blood sugar, insulin, glycogen and fat flux are normally invisible. Lumora surfaces them in a live model, so your decisions rest on data, not guesswork.
Enter your profile and meals; coupled equations compute the rest. Each step feeds the next and the whole day is redrawn live.
You enter age, height, weight, activity level and your sleep/wake times, then log your meals. This sets the model's initial state — basal metabolism, circadian rhythm, energy stores. Each meal enters the system as an input with its carbohydrate / protein / fat macros.
The engine integrates glucose, insulin, ghrelin, leptin, cortisol, glycogen and fat flux across the day in ~3-minute steps, using coupled differential equations. You see the hormone rhythm rise and fall in real time, and exactly which meal spikes insulin.
You see, gram by gram, exactly when your body switches to burning fat. The Krebs (energy) cycle shows how fuel becomes ATP; as glycogen depletes you watch the shift toward ketosis. A "fat burned today" counter tells you at a glance whether it is decreasing or increasing.
You add a meal and instantly see its hormonal impact. It tracks estimated body fat, muscle and weight over time; when you log a weigh-in, it shows the deviation from the simulation. A step counter (pedometer) measures your movement to make the daily burn more accurate, and offers personalized fasting and meal-timing insight.
At its core, Lumora is a physiological simulation engine: a system of coupled differential equations solved forward through the day. The schematic below shows the whole flow from meal to ATP — the exact coefficients, response curves and coupling terms are proprietary and not disclosed.
Glucose, insulin, ghrelin, leptin, cortisol, melatonin, adrenaline and ketones evolve together, each influencing the others — not a single formula but a mutually-coupled system.
Liver glycogen (~100g), muscle glycogen (~400g), fat and lean mass are modeled as separate compartments that fill and drain through real flows.
At each step the model computes how much energy comes from carbohydrate, fat, ketone and protein — a fuel mix in the spirit of the respiratory quotient.
The system is integrated forward in ~3-minute steps across 24 hours; depot states carry over realistically from one day to the next.
Cortisol and melatonin follow your sleep-wake cycle and modulate metabolic rate through the day; morning and night respond differently to the same meal.
Cumulative fat and lean-mass change is derived from energy balance and substrate flows, and personally calibrated against the weigh-ins you enter.
From hormone rhythm to fat burning, from nutrition to notifications — connected, live and visual end to end.
Shows how much fat you are burning right now at gram resolution, with clear decreasing / increasing indicators.
Insulin, cortisol, ghrelin, leptin, growth hormone, blood sugar and ketones — as a live time-series through the day.
An interactive energy cycle that shows, step by step, how the cell turns fuel into ATP.
Instantly visualizes each meal's effect on insulin, blood sugar and satiety.
Estimated fat, muscle and weight trend; your weigh-ins are marked with the deviation from the simulation.
Uses your phone's pedometer to measure movement and compute your daily energy expenditure more accurately.
Notifies you when fat-burning starts, glycogen is depleted, you enter ketosis and you hit fat-burn milestones.
Shows your status live on the lock screen; you choose which values appear (Live Activities on iOS).
Your sleep and wake times drive the model, giving personalized insight based on meal timing and the rhythm of your day.
The model's parameters come from published metabolic research. Every number in the app links to its source (PubMed / StatPearls / USDA / WHO). Lumora is an educational and tracking tool; all values shown are estimates from a mathematical simulation — not a medical measurement, diagnosis or advice.
The screens below are captured from the live app. Click to enlarge; drag to browse.
The simulation runs on your device; you can use it without an account. No ads, no data selling.
The metabolic computation happens on your phone; it works fully offline without an account.
If you create an account, your data syncs encrypted; you can export it or delete it from the server anytime.
Your data is never used for marketing, profiling or ads. Sign in with Apple and Google is supported.
Start with a 7-day free trial. Continue with Lumora Premium (monthly or yearly) to unlock the full simulator.