Ranks compare your best set to your bodyweight — every rank is a milestone on the same road, never a judgement. The next one is always in reach.

Food search draws on four sources, in order: your Verified foods (values you entered from the pack — the most accurate source there is), the Australian Food Composition Database (FSANZ Release 3 — 1,588 Australian foods with 58 measured nutrients each, shown first in search), the UK Composition of Foods Integrated Dataset (CoFID 2021, ~2,850 lab-analysed foods, Crown copyright), and two live databases — Open Food Facts (community-contributed packaged food data, including barcodes) and USDA FoodData Central. Community data can contain errors: when a label disagrees with the app, trust the label, and use "Edit macros" to correct it.

The Nutrients page totals 16 nutrients. Built-in staples and USDA foods carry full profiles; packaged foods only contribute what their label publishes, so totals are a floor, not a ceiling. Daily targets follow public guidance (WHO and Australian NHMRC reference values): upper limits for saturated fat and sugar are 10% of your calorie goal, sodium 2,300 mg, and mineral/vitamin targets adjust for gender. They're general guidance, not medical advice.

Strength sessions use the standard MET formula: calories per minute = MET × 3.5 × bodyweight (kg) ÷ 200, with a moderate resistance-training MET applied across your session time. Cardio uses machine-specific MET values and your entered minutes — or, better, the calorie readout from the machine itself if you type it in. These are honest estimates, typically within ±20%.

Steps convert at roughly 0.0004 kcal per step per kg of bodyweight — about 320 kcal for 10,000 steps at 80 kg — a widely used walking approximation. Steps are entered manually for now.

Ranks compare your estimated one-rep max (Epley formula: weight × (1 + reps ÷ 30)) against bodyweight-ratio strength standards modelled on published community lifting data — for example, a bench press of 0.5× bodyweight is Foundation, 1× is Strong, 2× is Elite; squat and deadlift run higher, isolation lifts lower. Bodyweight exercises rank by reps. Thresholds adjust for gender. Ranks are milestones for motivation — they carry no judgement and no comparison to anyone but yesterday's you.

Your remaining calories = daily goal − food eaten + calories burnt (workouts and steps). This "earn back" model matches how most trackers handle exercise. Weight-change maths is simple energy balance; sustainable change is 0.25–0.5 kg per week.

Photos are resized on your device, stored locally alongside the weigh-in of the day they were taken, and never uploaded. TRAK keeps the most recent 24 to stay inside the browser's storage limit. They're included in your data export and erased by "Delete all my data".

Everything you log lives only on this device. TRAK has no accounts, no analytics, and no server — the only data that ever leaves your phone is the anonymous text of a food search sent to the databases above. Settings offers a full export of your data, and permanent deletion, at any time.