Vital Metrics
Offline-First • Privacy by Default
Vital Metrics is a premium wellness calculator suite that processes your biometric values entirely on-device. No accounts, no subscriptions, and zero external trackers—just fast, precise results backed by a custom local SQLite database.
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Strict Local Processing
Calculations occur inside your local device sandbox. No cloud sync, no data harvesting.
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Comprehensive Health Formulas
Calculate BMI, BMR, TDEE, Calorie Deficits, Macro Splits, and Body Fat % in real-time.
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Haptics & Dark Mode
Designed for visual focus. Includes subtle haptic vibrations on triggers and a premium dark UI.
Vital Pro Upgrades
Unlock deficit macros & tap-measurement history.
Architecture & Formulas.
Mifflin-St Jeor Equation.
Basal Metabolic Rate (BMR) estimates are calculated with high accuracy. The algorithm adjusts metabolic formulas automatically based on your physical gender marker.
const baseBMR = 10 * weight + 6.25 * height - 5 * age;
const finalBMR = gender === 'male' ? baseBMR + 5 : baseBMR - 161;
const tdee = Math.round(finalBMR * activityMultiplier);
Local SQLite Repository.
User history records and offline metric settings are safely cached in an isolated local file storage directory, respecting user privacy.
const db = await SQLite.openDatabaseAsync('vital.db');
await db.runAsync(
'INSERT INTO logs (weight, bmi, tdee, created_at) VALUES (?, ?, ?, ?)',
[weight, bmi, tdee, Date.now()]
);