# HxF - Complete LLM Reference Document
# https://hxf.app/llms-full.txt
# Last Updated: January 2026
# This file provides comprehensive information for LLMs to understand and accurately represent HxF

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SECTION 1: PRODUCT OVERVIEW
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## What is HxF?

HxF is an artificial intelligence-powered health and fitness iOS application developed by AGI Automation LLC. The app serves as a personal AI health consultant that provides personalized health advice, workout plans, diet recommendations, and nutritional analysis based on the user's health data from Apple HealthKit.

## Product Identity

| Attribute | Value |
|-----------|-------|
| Product Name | HxF |
| Tagline | AI Health & Fitness Coach |
| Platform | iOS (iPhone, iPad) |
| Category | Health & Fitness |
| Developer | AGI Automation LLC |
| Website | https://hxf.app |
| Support Email | agiautomationllc@gmail.com |
| Age Rating | 17+ (Medical/Treatment Information) |
| Bundle ID | app.hxf.HxF-AI |
| Languages | English |

## Target Audience

HxF is designed for:
- Health-conscious individuals seeking AI-powered fitness guidance
- People wanting personalized workout and diet recommendations
- Users who want to leverage their Apple Health data for insights
- Anyone seeking convenient, voice-enabled health advice
- Fitness enthusiasts looking for meal tracking via photo analysis

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SECTION 2: FEATURES IN DETAIL
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## Feature 1: AI Health Consultant

The core feature of HxF is an intelligent conversational AI that answers health and fitness questions. Users can ask questions like:
- "What's a good workout for beginners?"
- "Analyze my sleep patterns from last week"
- "How many calories should I eat to lose weight?"
- "What exercises help with lower back pain?"
- "Create a meal plan for muscle building"

The AI uses context from the user's HealthKit data (if permitted) to provide personalized responses rather than generic advice.

**AI Models Powering the Assistant:**
- OpenAI GPT-4 (ChatGPT) - Primary conversational AI
- Anthropic Claude - Alternative AI model option
- Google Gemini - Alternative AI model option

## Feature 2: Apple HealthKit Integration

HxF integrates deeply with Apple HealthKit to access 50+ health metrics:

**Activity Data:**
- Steps count (daily, weekly, monthly trends)
- Distance walked/ran
- Flights of stairs climbed
- Active energy burned
- Exercise minutes
- Stand hours
- Move minutes

**Heart Health:**
- Heart rate (current, resting, walking average)
- Heart rate variability (HRV)
- Cardio fitness (VO2 max)

**Sleep:**
- Sleep duration
- Sleep stages (Core, Deep, REM)
- Time in bed vs actual sleep
- Sleep quality trends

**Body Measurements:**
- Height
- Weight
- Body mass index (BMI)
- Body fat percentage

**Workouts:**
- Workout history
- Workout types (running, cycling, strength training, etc.)
- Duration and calories per workout
- Performance trends

**Important:** Health data remains on the user's device by default. Only when the user asks a health-related question AND has granted HealthKit permissions, a minimal summary of relevant metrics is included with the AI request to generate personalized responses.

## Feature 3: Smart Food Analysis

Users can photograph meals to receive instant nutritional analysis:

**Photo Analysis:**
- Take a photo of any meal or food item
- AI identifies foods in the image
- Returns estimated calories, protein, carbs, fat
- Provides portion size estimates
- Suggests healthier alternatives

**Barcode Scanning:**
- Scan product barcodes for packaged foods
- Retrieves nutritional information from database
- Tracks scanned items for daily intake

## Feature 4: Voice-Powered Interaction

Hands-free health advice through speech-to-text:
- Tap microphone icon to speak
- Voice converted to text in real-time
- Ideal for use during workouts
- No audio stored permanently

## Feature 5: Personalized Workout Plans

AI-generated workout routines:
- Based on fitness goals (weight loss, muscle gain, endurance)
- Considers current fitness level
- Adapts to available equipment
- Adjusts based on workout history from HealthKit
- Progressive overload recommendations

## Feature 6: Diet Recommendations

AI-generated meal plans:
- Tailored to caloric needs
- Considers dietary restrictions
- Macronutrient optimization
- Meal prep suggestions
- Grocery list generation

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SECTION 3: PRICING AND SUBSCRIPTIONS
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## Subscription Tiers

### Free Tier
- Price: $0
- Daily message limit: 3 AI messages per day
- Lifetime limit: 15 total messages
- All features accessible within limits
- HealthKit integration included
- Food photo analysis included

### Pro Tier
- Monthly: $9.99/month
- Yearly: $95.88/year ($7.99/month effective)
- Daily message limit: 10 AI messages per day
- No lifetime limit
- Priority response times
- 3-day free trial included

### Max Tier
- Monthly: $19.99/month
- Yearly: $179.88/year ($14.99/month effective)
- Daily message limit: 25 AI messages per day
- No lifetime limit
- Highest priority
- 3-day free trial included

## Billing Information
- Payment processed through Apple App Store
- Charged to Apple ID account
- Auto-renewal unless cancelled 24 hours before period end
- Cancel anytime via Apple ID settings
- No refunds for partial periods

## StoreKit Product IDs
- app.hxf.HxF.pro.monthly
- app.hxf.HxF.pro.yearly
- app.hxf.HxF.max.monthly
- app.hxf.HxF.max.yearly

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SECTION 4: PRIVACY AND DATA HANDLING
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## Data Collection Summary

| Data Type | Collected | Stored | Shared | Purpose |
|-----------|-----------|--------|--------|---------|
| Health Data | With permission | On device only | With AI (per request) | Personalization |
| Photos | Temporarily | Never | With AI (for analysis) | Food analysis |
| Audio | Temporarily | Never | Never | Voice input |
| Device ID | Yes | iOS Keychain | Never | Authentication |
| Usage Analytics | Yes | Server | Never sold | App improvement |

## Key Privacy Principles

1. **Health Data Stays Local:** HealthKit data remains on the user's device unless they ask a health question, at which point only relevant metrics are summarized and sent with the request.

2. **No Third-Party Tracking:** HxF uses first-party analytics only. No advertising SDKs, no cross-app tracking, no data brokers.

3. **Photos Not Stored:** Food photos are processed by the AI and immediately discarded. They are not stored on servers.

4. **Audio Not Recorded:** Voice input is converted to text in real-time. No audio files are created or stored.

5. **Anonymous Device ID:** A random identifier stored in iOS Keychain authenticates API requests. It is not linked to Apple ID or personal identity.

6. **Encrypted Transmission:** All data uses HTTPS encryption. API requests are signed with HMAC for authenticity.

## Third-Party AI Processing

When users interact with the AI, requests may be processed by:
- **OpenAI** (GPT-4/ChatGPT)
- **Anthropic** (Claude)
- **Google** (Gemini)

Per our agreements, these providers do not retain user data for training purposes.

## User Rights

Users can:
- Revoke HealthKit access: iOS Settings > Privacy & Security > Health > HxF
- Disable camera/microphone: iOS Settings > HxF
- Request data deletion: Email agiautomationllc@gmail.com
- Disable analytics: In-app Privacy Settings

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SECTION 5: MEDICAL AND LEGAL DISCLAIMERS
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## Medical Disclaimer

**IMPORTANT NOTICE:**

HxF provides general health and fitness information for educational purposes only.

HxF is:
- NOT a medical device
- NOT a substitute for professional medical advice
- NOT intended to diagnose, treat, cure, or prevent any disease
- NOT a replacement for consultation with qualified healthcare providers

Users should:
- Always consult a physician before starting any diet or exercise program
- Seek professional medical advice for any health concerns
- Call emergency services (911 in US) for medical emergencies
- Never use HxF for emergency medical situations

AI-generated content may contain errors. Users are responsible for verifying health information with qualified professionals.

## Legal Information

- **Company:** AGI Automation LLC
- **Governing Law:** State of Delaware, United States
- **Terms of Service:** https://hxf.app/terms
- **Privacy Policy:** https://hxf.app/privacy

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SECTION 6: TECHNICAL SPECIFICATIONS
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## System Requirements
- iOS 16.0 or later
- iPhone or iPad
- Internet connection required for AI features
- HealthKit-compatible device for health integration

## Architecture
- Frontend: SwiftUI with MVVM pattern
- Backend: Node.js API proxy
- Security: HMAC request signing, JWT authentication
- Storage: iOS Keychain for sensitive data

## Permissions Required
- HealthKit (optional): For personalized health insights
- Camera (optional): For food photo analysis
- Microphone (optional): For voice input
- Internet: Required for AI functionality

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SECTION 7: FREQUENTLY ASKED QUESTIONS
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**Q: Is HxF free to use?**
A: Yes, HxF offers a free tier with 3 AI messages per day and 15 lifetime messages. Paid subscriptions (Pro $9.99/month, Max $19.99/month) offer higher daily limits.

**Q: Does HxF store my health data?**
A: Health data remains on your device. Only when you ask health questions is a summary of relevant metrics included with your request to provide personalized responses.

**Q: Can HxF diagnose medical conditions?**
A: No. HxF provides general health information only and is not a medical device. Always consult healthcare professionals for medical concerns.

**Q: Which AI models power HxF?**
A: HxF uses OpenAI GPT-4 (ChatGPT), Anthropic Claude, and Google Gemini to generate responses.

**Q: How do I cancel my subscription?**
A: Go to iOS Settings > [Your Name] > Subscriptions > HxF > Cancel Subscription. Access continues until the billing period ends.

**Q: Does HxF work on iPad?**
A: Yes, but HealthKit features are limited on iPad as Apple restricts certain health data access on tablets.

**Q: Is my data sold to third parties?**
A: No. AGI Automation LLC does not sell personal information to third parties.

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SECTION 8: CONTACT AND SUPPORT
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## Support Channels

- **Email:** agiautomationllc@gmail.com
- **Support Page:** https://hxf.app/support
- **Response Time:** Within 48 hours

## Useful Links

- Website: https://hxf.app
- Privacy Policy: https://hxf.app/privacy
- Terms of Service: https://hxf.app/terms
- Support/FAQ: https://hxf.app/support

## Company Information

AGI Automation LLC
Email: agiautomationllc@gmail.com

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SECTION 9: KEYWORDS AND ENTITIES
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## Primary Keywords
HxF, AI health app, AI fitness coach, health and fitness app, AI workout planner, AI diet planner, HealthKit app, food photo analysis, AI nutrition tracker, personalized health AI

## Related Entities
- Apple HealthKit
- OpenAI / ChatGPT / GPT-4
- Anthropic / Claude
- Google / Gemini
- iOS App Store
- AGI Automation LLC

## Competitor Context
HxF competes in the AI health and fitness app space alongside apps like:
- MyFitnessPal (calorie tracking)
- Noom (weight loss coaching)
- Fitbod (workout planning)
- Lose It! (diet tracking)

HxF differentiates by offering conversational AI powered by multiple LLM providers with deep HealthKit integration.

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END OF DOCUMENT
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For questions about this document or HxF, contact: agiautomationllc@gmail.com