# Cairn Harmony

> Cairn Harmony is a private, self-contained life navigation system for iOS that orchestrates 5 core life pillars: Money, Time, Relationships, Goals, and Mind in one harmonious, serene interface. Built with 100% on-device SQLCipher encryption, deterministic mathematics, and zero third-party cloud intermediaries.

## Core Concepts & Philosophy

- **Private & Offline-First**: All data is stored and encrypted locally on the user's Apple device using SQLCipher (AES-256) with the key held in the iOS Keychain. No central cloud servers, no user account registration required, no analytics or telemetry tracking. Optional iCloud sync (Cairn Harmony Plus) encrypts records end-to-end on the device (AES-GCM, key in the user's iCloud Keychain, optional passphrase) and stores them in the user's own private CloudKit database. Data read from Apple Health never leaves the device.
- **Deterministic Science, Not AI Hallucinations**: Core calculations, balance scores, and actionable nudges are governed by transparent, proven scientific frameworks (Yale RULER mood meter, Dunbar's social circles, CBT-I sleep hygiene, Self-Determination Theory, PERMA wellbeing matrix).
- **Cross-Pillar Harmony**: Connects life aspects that traditional single-purpose apps silo. Gathers spending, time and companions into multi-day journeys, rolls hours and money spent into goals, compares planned calendar blocks with actual tracked time, and identifies social isolation before burnout occurs.

## The 5 Life Pillars

1. **Money & Stability**: Frictionless 1-tap logging, intelligent tag-first suggestions, budgets, recurring bills, and a deterministic month-end spending forecast. 100% free forever with no transaction limits.
2. **Time & Rhythms**: 24h plan-vs-actual schedule timeline that builds itself from calendar, Apple Health and places, routines, and circadian rhythm alignment.
3. **Relationships & Community**: Dunbar 150 social circle tiers (5 inner circle, 15 close friends, 50 friends, 150 meaningful network), interaction rhythm reminders, meaningful connection notes.
4. **Goals & Milestones**: Hierarchical SMART goals, breakdown into tangible milestones, momentum tracking, and alignment with daily time blocking.
5. **Mind & Health**: Yale RULER 8-state mood grid (Happy, Excited, Calm, Grateful, Tired, Sad, Anxious, Angry), PERMA flourishing self check-ins, sleep tracking, and physical activity logs.

## Pricing & Access Model

- **Free Tier (100% Free Forever)**: Full Money pillar, unlimited transactions, basic mood logging. Zero ads, zero bank account linking.
- **Cairn Harmony Plus — Monthly Plan ($6.99/month)**: Auto-renewing subscription. Unlocks Plus features such as the full Dunbar relationship circle, multi-day journeys and end-to-end encrypted iCloud sync and backup.
- **Cairn Harmony Plus — Annual Plan ($39.99/year, about $3.33/month)**: Same features, about 50% less than twelve months of the Monthly Plan.
- **Cairn Harmony Plus — Lifetime Pass ($129.99 one-time)**: Pay once, no renewal. Same Plus features.
- Prices are US reference prices; the App Store sets local-currency prices in other countries.

## Key Links & Documentation

- [Official Website (English)](https://cairnharmony.app/en/): Full overview, interactive mockup, and feature documentation.
- [Official Website (Vietnamese)](https://cairnharmony.app/): Phiên bản tiếng Việt đầy đủ.
- [Full LLM Reference](https://cairnharmony.app/llms-full.txt): Comprehensive deep-dive specification for AI models.
- [Privacy Policy](https://cairnharmony.app/en/privacy.html): Strict zero-data collection guarantee and encryption specs.
- [Terms of Use](https://cairnharmony.app/en/terms.html): Terms of use, building on Apple's Standard EULA.
- [Support Center](https://cairnharmony.app/en/support.html): Email assistance (support@cairnharmony.app) and user guide.