Lunar calendar · I Ching · Four Pillars · Feng shui
Qelunai lays the Vietnamese lunar calendar, auspicious hours, the I Ching and your family memorial days on a lacquer panel: black lacquer, gold leaf, son red. Every calculation runs on your phone.
Coming to the App Store and Google Play.
Try on the website
In the app
The screens below are taken from the real app.
Today
Open the app and the day’s page is waiting: solar and lunar date, can chi, whether the day is auspicious (hoàng đạo) or not, the day officer (trực) and the solar term.
Lunar calendar
A month grid with the lunar day under every solar day and marks for auspicious days, the new moon and the full moon. Tap a day for all 12 hours, its can chi, officer and solar term.
I Ching
Breathe slowly three times, hold your question in mind, then toss three coins six times by tapping or shaking the phone. Qelunai builds the primary and changed hexagrams and reads each line.
Feng shui
From your birth year and gender, Qelunai works out your kua number, whether you belong to the East or West group, and your 4 good and 4 bad directions.
Memorial days
Enter a death anniversary by its lunar date once. Each year Qelunai converts it to the solar date and reminds you ahead of time.
Numerology
Pythagorean numerology from your full birth name and solar birth date.
Four Pillars
The four pillars set by the solar terms in Vietnam time (UTC+7), following the Tử Bình school.
Always with you
On iPhone and Android: solar and lunar date, can chi and the next good hour, without opening the app.
Sign in with Email, Google or Apple. Birth profiles, cast history and memorial days are backed up to your account.
Lunar dates, can chi, auspicious hours and charts are calculated on the phone and still work offline.
Switch language any time. Can chi, hexagram and solar-term names keep their Vietnamese originals.
How we work
Calendars, hexagrams and charts are cultural heritage to reflect on. Qelunai does not predict and does not replace medical, legal or financial advice.
Each use of data has its own box, none ticked in advance. Withdraw any of them at any time, in Profile.
Ads and analytics never receive your name, birth date, cast history or memorial days.
FAQ
Yes. The calendar, auspicious hours, charts, I Ching, compatibility and age cards are free. The free version may show ads. Qelunai Plus, once it is in the stores, removes ads and adds a 12-month good-day search, unlimited family profiles and more memorial-day reminders.
Yes. Sign in with Email, Google or Apple so your birth profiles, cast history and memorial days are backed up and available on every device.
Vietnam time (UTC+7). The Vietnamese and Chinese lunar calendars differ by a day in some years because of the time zone; Qelunai follows the Vietnamese one.
On your phone and in your account on Cloud Firestore (Google), in the Singapore region. Only your account can read it. Details are on the Privacy page.
iPhone (iOS 15 or later, widgets need iOS 16) and Android phones.
In the app: Profile > Delete account. Or email [email protected] from the address you signed up with. See the Delete account page.
Get Qelunai for iPhone or Android.
Coming to the App Store and Google Play.