I Ching Changing Lines Simulator

Cast the Book of Changes with the authentic three-coin method. Visual changing lines (old yin/old yang), all 64 hexagrams with full judgments, image texts, and moving line interpretations.

What You Get

Authentic three-coin method (3 coins × 6 lines = 18 tosses)
Visual coins: Yang (3 heads), Yin (2 heads/1 tail), Old Yang (3 tails), Old Yin (3 heads)
64 hexagrams built line-by-line from bottom to top
Full Wilhelm/Baynes judgments, image texts, and moving line texts
Changing lines highlighted with animation (old yang → yin, old yin → yang)
Resulting hexagram (after changes) with full text
Cast history saved locally (private, no tracking)
Works offline — no signup, no tracking, no data collection

Qian / The Creative

乾

Judgment (Tuanzhuan)

Moving Lines (Yaoci)

Recent Casts

Free Web Tool vs Premium Android App

Feature	Free Web	Premium App
Authentic three-coin method	✓	✓
All 64 hexagrams with judgments	✓	✓
Visual changing lines (old yin/yang)	✓	✓
Full moving line texts	✓	✓
Resulting hexagram after changes	✓	✓
Nuclear hexagram & trigram analysis	✗	✓
Cast history with tags & export	✗	✓
Daily hexagram widget & notifications	✗	✓
Works 100% offline	✗	✓
No ads, no tracking, no accounts	✓	✓
Price	Free	$3.99

"The web caster showed me the changing lines visually — I finally understood how old yang becomes yin. I Ching Oracle app added nuclear hexagrams, trigram analysis, and a cast journal I use for every major decision. The daily hexagram widget is uncannily accurate."

— Chen W., verified purchaser, I Ching Oracle

Free vs Premium

Is the three-coin method mathematically correct?

Yes. Three coins: 3 heads = Old Yin (6, moving), 2 heads/1 tail = Yang (7, stable), 1 head/2 tails = Yin (8, stable), 3 tails = Old Yang (9, moving). Probabilities: Old Yin 12.5%, Yang 37.5%, Yin 37.5%, Old Yang 12.5% — exactly matching the traditional yarrow stalk probabilities (1:3:3:1).

Does the premium app need internet?

No. 100% offline. All 64 hexagrams, judgments, moving lines, and nuclear hexagram calculations run locally. No accounts, no telemetry.

Is this a subscription?

One-time payment of $3.99. Own it forever.

☯️ Master the Book of Changes

You've cast the hexagram — now unlock the full oracle. The I Ching Oracle Android app gives you: nuclear hexagrams, trigram interaction analysis, cast journal with tags/export, daily hexagram widget, and offline access to all 64 hexagrams with complete Wilhelm/Baynes texts.

Nuclear Hexagrams Trigram Analysis Journal Offline

$3.99

☯️ Get I Ching Oracle

100% offline · No ads · No tracking · One-time payment · 7-day guarantee

I Ching Oracle $3.99 Nuclear Hexagrams · Trigram Analysis · Journal Get App →

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Take this offline with the app

This tool runs in your browser and nothing is saved after you close the tab. The app keeps a library, a journal and works in aeroplane mode. One-time payment, no subscription, no ads.

Get I Ching Oracle — $3.99 Read what inside → Get all 12 apps for $29.99 → The book: Codex Chaoticus — $4.99