Question 1

How should I ask questions to get the most accurate answers from 8Letters AI?

Accepted Answer

8Letters is not just a simple chatbot but a 'high-precision destiny simulator.' Your questions act as queries that explore the internal database, so the more specific your situation and clear your goals, the exponentially higher the resolution of the analysis.

Question 2

What is the difference between Easy Mode and Pro Mode?

Accepted Answer

You can select between two modes depending on your familiarity with Saju terminology and preferred style.

Question 3

What is the thinking level and how do I adjust it?

Accepted Answer

In the right panel (Settings), you can adjust the AI's computational depth from level 1 to level 5. The higher the level, the stronger the AI's logical reasoning and complex pattern analysis capabilities, yielding more precise results. For light daily advice, use a low level; for major life decisions (marriage, business, job change, etc.), a high level is recommended. However, higher levels consume more credits.

Question 4

What are the functions of the tools (Cross Check, Classical Archive, Expert Mode)?

Accepted Answer

These are three powerful extension tools that complement AI analysis.

Question 5

How do I use the system instruction?

Accepted Answer

This feature allows you to force the AI's tone and manner (speaking style) or a specific persona. Click 'System Instruction' in the right panel to write and save your own instructions. For example, you can set it to "Answer like a close friend using casual speech" or "Explain like a professional metaphysician mixing in Chinese characters."

Question 6

How do I modify my Saju information (profile)?

Accepted Answer

You can modify your profile via the 'Profile Selection' menu in the right panel or from the `[Settings] > [Membership] > [Mailing]` page. If your birth date/time changes, the existing analysis cache is immediately discarded, and new Natal Chart data including Heavenly Stems, Earthly Branches, Hidden Stems, 12 Stages of Life, and Symbolic Stars are recalculated through the core calculation engine.

Question 7

Can I also see compatibility (multi-person analysis) with family or partners?

Accepted Answer

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.).

Question 8

What is the Daily Saju Newsletter (Mailing Service)?

Accepted Answer

It is a subscription service that delivers a precise daily Saju flow, changing every 2 hours, via email without needing to access a complex app. It combines the results of the basic core calculation engine with the AI interpretation engine (with optional Cross Check, expert mode, and classical archive) to provide the most intuitive and easy-to-understand report. You can manage subscription and option settings on the `[Settings] > [Membership] > [Mailing]` page.

Question 9

What are the email sending times and first receipt timing?

Accepted Answer

The mailing service sends emails daily according to the time set by the user. However, the first email sending time may vary depending on the subscription (payment approval) time and the set time.

Question 10

Why are the results always wrong when I ask general AI about Saju?

Accepted Answer

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 Manse Calendar engine for Saju calculations. This leads to the following critical limitations.

Question 11

How did 8Letters solve this problem?

Accepted Answer

8Letters never leaves Saju 'calculation' to the AI. Instead, it has built a hybrid system where a 'high-precision Manse Calendar engine' performs all calculations, and the AI is solely responsible for 'interpretation.'

Question 12

Does it contain 'all data' for 100 years?

Accepted Answer

Yes, it does. But it is not simply 'stored' data; it is in the form of a 'real-time calculation engine.'

Question 13

What specific information is included?

Accepted Answer

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.

Question 14

How does AI utilize this vast amount of information?

Accepted Answer

If we feed all 100 years of daily data to the AI at once, it causes information overload (noise). That's why we use the 'Smart Extraction' method.

Question 15

How is 8Letters' time calculation different from ordinary saju apps? (True Solar Time & Global Timezone Auto-Detection)

Accepted Answer

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.

Feature / Specification	Starter	Pro 1	Pro 2	Premium 1	Premium 2	Enterprise
Monthly Price	$5.39	$26	$53	$98.90	$179	$289
Daily Resources
Daily Credits	15,000	75,000	150,000	300,000	600,000	1,200,000
Profile Slots	1	+4 Slots	+6 Slots	+9 Slots	+11 Slots	+13 Slots
Fortune Dashboard	✓	✓	✓	✓	✓	✓
Push Service	✓	✓	✓	✓	✓	✓
Data Verification Tools
Cross Check	-	✓	✓	✓	✓	✓
Classical Archive (8 Major Texts)	-	✓	✓	✓	✓	✓
Expert Mode (Clinical Data)	-	✓	✓	✓	✓	✓
AI Engine
Pro Deep Reasoning Model Access	-	✓	✓	✓	✓	✓
System Instruction Character Limit	N/A	350 chars	620 chars	2,420 chars	5,120 chars	11,600 chars

Feature / Specification	Starter	Pro 1	Pro 2	Premium 1	Premium 2	Enterprise
Monthly Price	$5.39	$26	$53	$98.90	$179	$289
Daily Resources
Daily Credits	15,000	75,000	150,000	300,000	600,000	1,200,000
Profile Slots	1	+4 Slots	+6 Slots	+9 Slots	+11 Slots	+13 Slots
Fortune Dashboard	✓	✓	✓	✓	✓	✓
Push Service	✓	✓	✓	✓	✓	✓
Data Verification Tools
Cross Check	-	✓	✓	✓	✓	✓
Classical Archive (8 Major Texts)	-	✓	✓	✓	✓	✓
Expert Mode (Clinical Data)	-	✓	✓	✓	✓	✓
AI Engine
Pro Deep Reasoning Model Access	-	✓	✓	✓	✓	✓
System Instruction Character Limit	N/A	350 chars	620 chars	2,420 chars	5,120 chars	11,600 chars

8Letters AI High-Precision Saju Analysis - NASA JPL Solar Time Correction Logic & 11,844 Expert Cases

Membership Plans

Starter

Pro 1

Pro 2

Premium 1

Premium 2

Enterprise

Detailed Feature Comparison

Membership Plans

Starter

Pro 1

Pro 2

Premium 1

Premium 2

Enterprise

Detailed Feature Comparison

8Letters AI High-Precision Saju Analysis - NASA JPL Solar Time Correction Logic & 11,844 Expert Cases

8Letters 서비스 상품 및 요금 안내

Membership Plans

Starter

Pro 1

Pro 2

Premium 1

Premium 2

Enterprise

Detailed Feature Comparison

8Letters 서비스 상품 및 요금 안내

Membership Plans

Starter

Pro 1

Pro 2

Premium 1

Premium 2

Enterprise

Detailed Feature Comparison