Ngũ Linh
Thần Toán
Cast Ngũ Linh hexagrams in seconds — right on your phone.
Built on the Dịch Học Ngũ Linh method by Cao Từ Linh — a uniquely Vietnamese divination system combining the I Ching, the Heavenly Stems and Earthly Branches (Can Chi) and the Five Elements. Used privately since 2019, now open to every student of the Yijing.
Everything for fast, accurate casting
Pick any date and hour — the app derives the primary and changed hexagrams and the moving line.
Know the stems and branches already? Enter them directly — no calendar lookup.
Lunar–solar month calendar; tap any day to see its hexagram.
Browse the complete 64 hexagrams with meanings and detailed notes.
Derive guest hexagrams from the host — multiple castings within one hour.
Shows which palace the ruling star occupies — for sharper readings.
Inside the app
Real captures from the app — nothing mocked up.
Hoán Thời Pháp, automated
Follow the chain of hexagrams through each time-swap, with the matching star and hour stem-branch — no manual arithmetic.
Read every star in depth
Elemental nature, home palace and star type, plus separate Sinh Vượng (thriving) and Suy Tuyệt (declining) readings.
Enter any Can Chi
Set the Heavenly Stem and Earthly Branch for year, month, day and hour yourself to cast for any moment you need.
See the whole month
A month calendar paired with the hour-by-hour hexagram list, for picking a date for something that matters.
Look up all 64 hexagrams
The complete I Ching set with upper and lower trigrams, searchable by name or number.
Read the classical meaning
Hexagram figure, Cách (structure), Tượng (image) and Nghĩa (meaning) across two tabs: Giản Luận (brief reading) and Bản Nghĩa (classical text).
Dark mode and text size
Turn on dark mode, adjust the type size, and read the Ngũ Linh primer inside the app.
The algorithms follow “Dịch Học Ngũ Linh” by Cao Từ Linh (Trần Mạnh Linh), Văn Hoá Thông Tin Publishing, © 2007–2011 — from Yin-Yang, Five Elements and Bagua theory to casting methods and timing rules.
Get Ngũ Linh Thần Toán
Free to download on both platforms. Open the app and cast right away.
