Read your numbers, not a score.
LeanMark turns your height, weight, and activity into a BMI reading, a daily calorie and macro target, and a water target — presented like a lab report, not a fitness score. No streaks, no mascots, no guesswork.
Designed for people who want their numbers read plainly, not gamified.
Measure
BMI and a weight reference range, plotted on a fixed clinical scale.
Target
Daily calories, protein, carbs, fat, and water — sized to your goal.
Recalibrate
Weekly check-ins adjust your targets automatically.
BMI, plotted — not scored
Enter your height and weight and LeanMark plots your BMI on a fixed 18.5–25 normal band, exactly as the WHO classifies it, with your ideal weight range shown alongside it in kilograms. No colour-coded pass/fail, no red for "bad" — just where you sit on the scale.
A full macro breakdown, not just a calorie number
Your calorie target is built from your basal metabolic rate and activity level, then split into protein, carbs, fat, and fibre — protein scaled up automatically the more aggressive your goal, to protect lean mass while you cut.
Recalibration keeps the plan honest
Log your weight once a week and LeanMark recomputes your targets against where you actually are, not where you started. See exactly what changed — before and after — every time.
Your BMI against the WHO's adult cutoffs, your total daily energy expenditure via the Mifflin-St Jeor equation, a daily calorie target sized to your goal, a protein/fat/carb/fibre split, and a water target.
No. LeanMark is general wellness information, not a diagnosis or treatment plan. Talk to a doctor or registered dietitian before starting a weight-management program, especially if you're pregnant, have a medical condition, or take medication.
No. The BMI and calorie/macro calculation is free and works without signing in. An account (Sign in with Apple or Google) is only needed for weekly recalibration, weight history, and AI meal suggestions.
No matter how aggressive a goal you set, your daily target is never allowed below a fixed floor — 1,200 kcal for women, 1,500 kcal for men.
Your daily calorie and macro numbers are sent to a language model to generate a one-day meal plan — no name, weight, height, or other personal detail is ever included in that request. The result is a general-wellness suggestion, not a clinical meal plan.
Optionally, yes — to pre-fill your weight instead of typing it in. Access is read-only; LeanMark never writes anything to Health.
The free calculation never touches a server at all. If you create an account for a Pro feature, your data is stored in a database that only your account can read or write, enforced at the database level. Full detail in the Privacy Policy below.
We're here to help.
For bug reports, feature requests, or any other questions — send us an email and we'll get back to you within 24–48 hours.
Email SupportYour data, your device.
Last updated: January 2, 2026
Overview
LeanMark is built so that using it for its core purpose — getting your BMI, calorie, and macro numbers — never requires an account and never sends anything to a server. This policy explains what changes once you do create an account.
The Free Calculator
Onboarding, your results, your goal, and your daily plan are computed entirely on your device. Nothing about your height, weight, age, or the numbers LeanMark shows you is sent anywhere unless you go on to create an account for a Pro feature.
Account, Body Data & Health Sync
Creating an account uses Sign in with Apple or Google — LeanMark never collects or stores a password. If you use recalibration or weight history, your body profile and weight-log entries are stored in our database, scoped to your account with row-level security enforced by the database itself. If you grant permission, LeanMark reads your most recent weight entry from Apple Health / Health Connect to pre-fill the weight field — this access is read-only, LeanMark never writes to Health.
AI Meal Suggestions
This feature sends only your numeric daily targets — calories, protein, carbs, and fat — to a third-party language model to generate a meal plan. Your name, weight, height, age, or any other identifying or health information is never included in that request.
Subscriptions & Payment
Subscriptions are billed by the App Store or Google Play and processed by RevenueCat, our subscription management provider. LeanMark never sees or stores your card details.
What We Don't Do
No advertising or advertising SDKs. No analytics or crash-reporting trackers of any kind. We never sell or share your data with data brokers. No push notifications — the one reminder LeanMark sends (a weekly check-in nudge) is scheduled entirely on your device.
Data Retention & Deletion
Weight-log history is capped at roughly five and a half years of daily entries per account as a technical safeguard. You can permanently delete your account and all associated data at any time from Account in the app — this removes your profile and weight history immediately and can't be undone. If you'd rather we do it for you, email hello@uvapps.com from the address on your account.
Contact
Questions about this Privacy Policy? Email us at hello@uvapps.com.