Customer Support
Learn how to fully utilize the 8Letters system and find answers to frequently asked questions.
1. Complete Guide to Using the 8Letters System
Q. What is the difference between Easy Mode and Master Mode?
You can select between two modes depending on your familiarity with Saju terminology and preferred style.
- Easy Mode (Natural Language): Strictly avoids complex technical Saju terms and explains your fortune using warm, everyday natural language and accessible real-life analogies.
- Master Mode (Expert Classic Analysis): Provides in-depth professional analysis incorporating full classical Saju terminology, classical RAG, and cross-verification tools.
You can switch modes anytime via the toggle on the chat screen or in the right settings panel.
Q. What is the Thinking Level, and what are the differences between Flash and Pro models?
In the right execution panel, you can freely adjust the AI's computational depth and model from Level 1 to 5.
• Lv 1–3 (Flash Model): Delivers fast response speeds and optimal computational efficiency. Best suited for daily consultations, light advice, and quick pillar checks with economical credit consumption.
• Lv 4–5 (Pro Deep Reasoning Model): Powered by a dedicated deep reasoning engine that thoroughly explores complex natal patterns (Gyeokguk), Useful/Favorable Gods, and multi-layered Luck Pillar interactions for critical life decisions such as career changes, business ventures, investments, or marriage. (Membership exclusive)
Q. What are the functions of the tools (Cross Check, Classical Archive, Expert Mode)?
These are three powerful extension tools that complement AI analysis.
- Cross Check: Performs analysis based on an integrated database of approximately 17,600 Eastern and Western cases, providing unbiased objective insights.
- Classical Archive: References all eight major classical texts on destiny, including Yeonhae-Japyeong and Sammyeong-Tonghoe, to add fundamental interpretations.
- Expert Mode: Trained on 11,844 cases of top 1% expert real consultations and clinical data, it provides realistic and intuitive solutions beyond theory.
Q. How do I use System Instructions?
This advanced personalization feature allows you to enforce the AI's tone, expertise level, or specific consulting persona. Click 'System Instructions' in the right execution panel to write and manage your instructions. Once saved, they are automatically synchronized with your cloud account and injected into your AI consultations in real time. (e.g., "Provide realistic, strategic advice from the perspective of a startup business consultant" or "Analyze the profound effects of the Ten Gods and Hidden Stems from a classical BaZi master's perspective.")
Q. How can I edit or add my Saju profile in Manse Calendar?
You can modify your Saju profile or add new profiles for family and colleagues anytime via the [Manse Calendar] menu or from the right panel. When you update your birth date, time, or birth city (with True Solar Time longitude and equation-of-time corrections), our built-in high-precision Manse Calendar engine instantly recalculates your Heavenly Stems, Earthly Branches, Hidden Stems, 12 Life Stages, Symbolic Stars, and Useful/Favorable Gods without a second of error, immediately synchronizing across all features and AI consultations.
Q. Can I also see compatibility (multi-person analysis) with family or partners?
Yes, 8Letters supports simultaneous multi-profile analysis. In the 'Profile Selection' panel on the right, check (activate) additional profiles of family, partners, or business partners besides yourself, then ask a question in the chat. The AI will load the Natal Charts of all active individuals simultaneously and precisely simulate interactions (Combination, Clash, Destruction, Harm, etc.).
Q. What is the 8Letters Life Matrix Dashboard, and what analysis features does it provide?
The 8Letters Life Matrix Dashboard goes far beyond superficial single-day guidance. Grounded in your 10-year Major Cycle (Luck Pillar), it executes multi-layered cross-calculations of daily pillars and hourly flows within the macro context of the Annual Pillar (Yearly Luck) and Monthly Pillar (Monthly Luck) across 5 specialized simulators.
• Today's Guidance (Daily): Analyzes the dynamic chemical interaction where Major Cycles, Annual, and Monthly flows converge onto today's daily pillar—featuring a 5-point radar chart (Wealth, Career, Love, Health, Study), 12 two-hour golden time action plans, and a 7-day biorhythm curve.
• Monthly Matrix (Monthly): Visualizes the month's pillar and 30-day wave curve aligned with your Annual and Major cycles, pinpointing peak opportunity windows and risk mitigation periods for proactive monthly planning.
• Yearly Matrix (Yearly): Synthesizes the year's annual pillar with your 10-year Major Cycle and natal chart across a 12-month calendar to forecast pivotal milestones and overarching growth trends.
• Specific Date Matrix (Specific): Pinpoints any significant past or future date to simulate how that specific day's energy intersects with your active Major, Annual, and Monthly cycles (Combinations, Clashes, Penalties, Harms).
• Optimal Timing Recommendation (Taelil): AI-driven date selection for moves, contracts, and key milestones, filtering out Major and Annual conflicts while maximizing auspicious celestial stars.
Q. When and how are the Daily Guidance Push Notifications delivered?
8Letters guidance pushes are far deeper than simple daily fortunes. Three times a day, our engine anchors your forecast in the macro trajectory of your <strong>10-year Major Cycle and Annual Pillar</strong>, dynamically calculating their intersection with the monthly and daily energies to proactively preview upcoming flows and strategic action steps (Pre-notification). Notifications automatically sync with your device's local timezone, and tapping an alert instantly opens your Today's Guidance Dashboard for detailed hourly guidance.
💡 Environment & Eligibility Guide (Mobile Native App Exclusive)
- Mobile Native App Exclusive: Web browser push is not supported. This service is exclusively delivered through the official 8Letters app (FCM Push) installed on mobile devices from the Google Play Store or Apple App Store.
- Eligibility: Automatically available for active membership subscribers. Simply enable notification permissions in the installed mobile app to receive them on schedule.
2. The Critical Difference Between General AI and 8Letters AI
Q. Why are the results always wrong when I ask general AI about Saju?
General large language models like Claude or ChatGPT are merely text generators that 'understand context and predict the next word'; they do not have an internal Saju Calendar engine for astrological calculations. This leads to the following critical limitations.
- Superficial daily analysis & no real-time calculations: General AI cannot synthesize which 10-year Major Cycle you are currently traversing, nor how this year's Annual Pillar and this month's Monthly Pillar intersect with your chart. It merely pulls raw date characters from the web, leading to baseless fiction as conversations progress.
- Major Cycle and Solar Term errors: Unable to calculate retrograde/direct Major Cycle directions based on gender and Yin-Yang polarity, or precise minute-level solar term boundaries, leading to fundamentally erroneous charts from the start.
- Hallucination: Fabricating non-existent astrological stars (Shinsal) and producing plausible-sounding but groundless interpretations based on flawed calculations.
Q. How did 8Letters solve this problem?
8Letters never delegates mathematical Saju calculations to AI. Instead, we architected a hybrid system where our ultra-precise Saju Calendar engine performs 100% of the computations, while the AI focuses solely on rich, contextual interpretation.
Proprietary High-Precision Engine
Featuring real-time astronomical calculation logic spanning 200 years (1900-2100), computing exact energetic interactions without a single second of discrepancy.
Zero-Hallucination Multi-Layer Injection
Prior to generating any response, the engine injects 100% factual multi-layered data: 10-year Major Cycle (Environment) ➔ Annual Pillar (Key Events) ➔ Monthly Pillar (Flow) ➔ Daily Pillar (Action), eliminating speculation at the root.
In essence, 8Letters combines an astronomically precise computational engine with state-of-the-art AI contextual synthesis, delivering a professional-grade solution far superior to generic AI chatbots.
3. Scope and Depth of Manse Calendar Analysis Information
Q. Does it contain 'all data' for 100 years?
Yes, it does. But it is not simply 'stored' data; it is in the form of a 'real-time calculation engine.'
- Our system mathematically and perfectly calculates the Heavenly Stems and Earthly Branches of every second, minute, hour, day, month, and year from 1900 to 2100.
- Once your birth date and time are set, the Luck Pillars, Annual Pillars, Monthly Pillars, and daily pillar information for the next 100 years are instantly generated from that moment.
Q. What specific information is included?
It is not just characters like "It's a Gapja day, it's an Eulchuk day." The data for each day includes all of the following information.
- Four Pillars: The Stem-Branch composition of that date
- Ten Gods: The correlation between you (Day Master) and the energy of that date (wealth luck, career luck, resource luck, etc.)
- 12 Stages of Life: The strength and energy flow of that energy
- Symbolic Stars: Special interactions such as Heavenly Virtue, White Tiger, etc.
Q. How does AI utilize this vast amount of information?
In Saju astrology, analyzing a single day's fortune in isolation is like mistaking a brief moment of sunshine during a harsh winter blizzard for the arrival of spring. Regardless of what you ask, 8Letters AI always executes Multi-layered Cross Analysis across all temporal horizons.
- Macro Environment (10-Year Major Cycle): First establishes your current 10-year cosmic season and major life turning points.
- Annual Theme (Annual Pillar): Identifies pivotal career events, relationship milestones, and macro opportunities governing the year.
- Mid-term Momentum (Monthly Pillar): Assesses this month's seasonal strength and energetic momentum to determine strategic timing.
- Micro Action (Daily Pillar & 12 Double-Hours): Synthesizes the above layers to pinpoint concrete 2-hour golden windows and optimal daily actions.
💡 Key Takeaway:
Whether analyzing 'Today's Fortune' or 'Next Year's Outlook', 8Letters AI seamlessly integrates 10-Year Major Cycle ➔ Annual Pillar ➔ Monthly Pillar ➔ Daily Flow, interpreting the profound significance of today's choices within the complete roadmap of your destiny.
Q. How is 8Letters' time calculation different from ordinary saju apps? (True Solar Time & Global Timezone Auto-Detection)
The time in Saju astrology is not the mean solar time shown by clocks, but the True Solar Time, which takes the moment the actual sun is overhead (due south) as noon (午時) as the absolute standard. The 8Letters engine adopts a Dual Correction Engine that dynamically integrates astronomical orbital equations and geographic coordinates — rather than a one-size-fits-all offset that only works for one specific region.
① Local Longitude Correction
Every timezone is defined by a standard meridian, but your birth city is rarely right on that line. For example, New York (EST) follows 75°W, yet Manhattan sits at 74°W — a difference that shifts the true solar noon. 8Letters pinpoints your birth city's exact longitude and corrects the time down to the second, so your Hour Pillar reflects where you actually were born, not where the timezone says you are.
② Equation of Time Correction
The Earth orbits the sun in an ellipse with a tilted axis, causing the sun's apparent motion speed to vary by season (date). 8Letters incorporates the solar declination and equation of time algorithms used by NASA JPL Ephemeris (DE431) and NOAA to perfectly correct orbital errors that can reach up to +16 minutes in winter and -14 minutes in spring.
③ Global Timezone Auto-Detection
No matter where you were born — New York, London, Sydney, Tokyo, or anywhere worldwide — simply selecting your birth city lets the system automatically detect your local UTC offset (EST/PST, GMT/BST, JST, etc.) and whether Daylight Saving Time (DST) is in effect. Regional timekeeping quirks — from Korea's traditional 30-minute shift to summer time adjustments across Europe and North America — are all handled automatically, so you get the most accurate Hour Pillar calculation for your actual location.
💡 Conclusion: A difference of just one minute can change the 'Hour Pillar (時柱)', which determines a quarter of one's life. 8Letters combines the depth of traditional astrology with the precision of modern astronomy to produce the most accurate natal chart.
4. Customer Support
For technical errors, payment and refund inquiries, and account-related issues encountered while using the 8Letters system, please contact us via the official support email below. Our engineering team will promptly review and respond.
Customer Support Email:
⚠️ Caution
We do not respond to personal interpretation requests for saju analysis results or fortune-related questions via this email. Please use the 8Letters AI chat for such inquiries.
