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.
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
#1
Qian / The Creative
乾
Judgment (Tuanzhuan)
Moving Lines (Yaoci)
Resulting Hexagram (After Changes)
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.
