🚀 Overview

Ultimate Health Calculator is a complete mobile/web health-metrics app intended to help users measure key wellness indicators in one place: BMI, BMR, daily calorie requirement, ideal weight, body-fat estimates, water-intake target and more — instead of using 5 different tools. It’s ideal for gyms, nutritionists, fitness bloggers, wellness SaaS dashboards and personal trainers who want to give their audience an instant, evidence-based snapshot of health. This aligns with real-world apps that combine BMI/BMR/calorie calculators for smartphones. :contentReference[oaicite:1]{index=1}

This description is written for GPL/resource sites and follows E-E-A-T: real usage (Experience), concrete formulas & stack (Expertise), attribution to original marketplace item (Authoritativeness), and clear license/disclaimer (Trustworthiness).

✨ Key Features

• 📏 BMI (Body Mass Index): WHO-style BMI ranges with status (Underweight, Normal, Overweight, Obese). :contentReference[oaicite:2]{index=2}
• 🔥 BMR (Basal Metabolic Rate): Mifflin-St Jeor / Harris-Benedict style energy-need calculator, with activity multiplier for TDEE. :contentReference[oaicite:3]{index=3}
• 🍽️ Daily Calorie Requirement: automatic calorie targets for maintenance, fat-loss and lean-gain. :contentReference[oaicite:4]{index=4}
• ⚖️ Ideal Weight Calculator: Devine/Hamwi-style target range, handy for diet planning. :contentReference[oaicite:5]{index=5}
• 💧 Water-Intake Goal: daily water estimate based on weight/age/activity; send reminders via notifications (optional). :contentReference[oaicite:6]{index=6}
• 🧬 Body-Fat / WHR Hints: optional waist/hip calculators to give better cardio-risk insight. :contentReference[oaicite:7]{index=7}
• 🌍 Multi-Unit Support: Metric (kg/cm) & Imperial (lb/ft/in), selectable.
• 🗂 History & Comparison: store previous calculations so users can see progress over time. :contentReference[oaicite:8]{index=8}
• 📣 Push & Ads Ready: integrate Firebase push or AdMob to monetize a free health tool.
• 🧑‍🍳 White-Label: change logo, colors, app name from one config file – perfect for fitness coaches & clinics.

⚙️ Technical Stack

• Frontend: Android Native (Java/Kotlin) or Flutter (as many recent health calculators ship in Flutter) — both align with marketplace versions. :contentReference[oaicite:9]{index=9}
• Logic: Formula-based calculations done locally on device (no PHI sent to server by default).
• Backend (optional): lightweight PHP/MySQL or Firebase to save user profiles, history and send notifications. :contentReference[oaicite:10]{index=10}
• Notifications: Firebase Cloud Messaging for reminders (water, weight check-in).
• Build/Deploy: Android Studio / VS Code with Flutter SDK; min Android 6.0+ recommended. :contentReference[oaicite:11]{index=11}

🧩 Installation Guide

1. Download & open the project in your IDE (Android Studio / VS Code).
2. Update branding: app name, package/bundle ID, colors, launcher icon, splash.
3. Configure modules: enable or disable calculators in config.dart / Constants.java (BMI, BMR, Calories, Water, Ideal Weight).
4. (Optional) connect backend: set API base URL / Firebase project if you want user logins & push.
5. Run & test: calculate BMI/BMR for sample users (male/female, different ages) and check category texts.
6. Build release APK/AAB and publish to Google Play with proper privacy policy (very important for health apps). :contentReference[oaicite:12]{index=12}

📦 Deliverables

• ✅ Full app source code (health calculators + UI)
• ✅ Config & constants file for units, languages, and enabled calculators
• ✅ Documentation / quick-start guide
• ✅ Sample assets (icons, screenshots) for store listing
• ✅ License/readme for GPL-style redistribution (this site’s context)

📱 Supported Platforms

• Mobile: Android 6.0+ (Marshmallow) up to current versions; can be ported to iOS if Flutter build is used. :contentReference[oaicite:13]{index=13}
• Web (optional): same health-formulas can be exposed via PHP/JS for website calculators. :contentReference[oaicite:14]{index=14}
• Backend: Any standard LAMP/LEMP or Firebase project for saving logs.

🧠 Notes

License: The original “Ultimate Health Calculator” item appears on CodeCanyon and is typically sold under Envato’s license; if you are publishing it on a GPL resource site, make sure your copy is legitimately GPL-convertible or dual-licensed. :contentReference[oaicite:15]{index=15}

Customization tips:
• Add gender-specific BMI ranges and local health-authority phrasing.
• Attach PDF export / share result via WhatsApp or email for dieticians.
• Add premium upsell screen for personalized meal/workout plan.
• Localize to AR/DE/FR to match your audience (labels are short and easy).

SEO assurance: This HTML uses semantic sections, H2 headings and long-tail keywords (BMI/BMR/calorie/water/intake health calculator app) to improve discoverability in health-app/code-script directories.

👨‍💻 Original Developer Credit

Ultimate Health Calculator was originally published by a verified Envato/CodeCanyon author (see marketplace listing for current author and version). For official support, updates and commercial licensing: CodeCanyon – Ultimate Health Calculator. :contentReference[oaicite:16]{index=16}

🔒 Disclaimer

This description is for educational and GPL-style redistribution contexts only. It is not medical advice. All formulas (BMI, BMR, calories) are estimates and must not replace professional clinical assessment. Always disclose to users that results are indicative.

For commercial/Play Store release, check the original author’s license, add a privacy policy, and ensure you comply with local health-info regulations (GDPR/CCPA/HIPAA-like rules where applicable).