A you written in five elements
Ten Eastern personality types plus your element balance. A name, a color and a badge: use it as an avatar, or as a conversation starter.
Day Master
Eastern personality · Five elements · Relationship rhythm
Know your five.
认识你的五行
Enter your birthday and see yourself written in five elements in 30 seconds. Bring a friend in and see the rhythm between you. Two traditional lenses, BaZi and Zi Wei, and a stated basis for every line.
- Birthday calculated on your device
- No ads
- No scare tactics, no upsell
- 18+ only
Your friend sees you as
The Mist
Yin Water · 癸
Quiet, and you notice everything.
ExampleWrite the problem you see in one line and share it with someone you trust
Basis Yin Water × Yang Fire · balance
Fire meets Water
Complementary One sparks, one cools
Why Knowfive
Be seen first. Plan second.
No good-or-bad scores, no fate. We turn a traditional system into three things you can use: who you are, which season you are in, and how you get along with the people around you.
Rhythm, not fate
Every ten years the season shifts: spring to sow, summer to stretch, autumn to harvest, winter to store up. Theme strength only, never good or bad.
Decade Season
A translator for relationships
Bonds come in three tiers (in sync, complementary, needs translation). No score. Just how the two of you move more smoothly together.
Bonds
A basis behind every line
Charts are calculated by an algorithm; AI only puts the facts into plain words. Every statement opens up to the chart detail behind it, so you can tell what was calculated from what was written.
Xiao Wu · AI guide (not a person)
Ten Eastern personality types · 10 Day Masters
Which one are you?
Wood The Trailblazer Yang Wood · 甲 Go first. The path shows up. Wood The Weaver Yin Wood · 乙 You always find the way around. Fire The Radiant Yang Fire · 丙 You warm the room before you speak. Fire The Lantern Yin Fire · 丁 You light up the person in front of you. Earth The Mountain Yang Earth · 戊 People lean in, and you hold. Earth The Gardener Yin Earth · 己 You grow things, slowly and well. Metal The Blade Yang Metal · 庚 One sentence, and you hit the point. Metal The Gem Yin Metal · 辛 Polished outside, precise inside. Water The River Yang Water · 壬 Always moving, always connecting. Water The Mist Yin Water · 癸 Quiet, and you notice everything.
Your type comes from the Day Master of your birth date. You only need the date; no birth time required.
Friends · 6 yearsExample
You · Yin WaterAh Cheng · Yang Fire
Fire meets Water
One sparks, one cools
In sync Complementary Needs translation
- She speaks first, you decide: smoothest when roles are clear.
- Ask her to dinner; ask you before big decisions.
- In an argument, translate first. She wants a response, not a plan.
Basis Yin Water × Yang Fire · balance
Bonds
No scores. Just translation.
We never put a number on a relationship. All three tiers are neutral or warm words, and the point is practical: where you flow, where you tend to misread each other, and what to say when you do.
- In sync
- Your frequencies are close, so many sentences need no ending.
- Complementary
- You each have your strengths, and together they fit.
- Needs translation
- You mean the same thing, in different dialects.
Invite someone to compareElement traits are shared only with the other person’s consent. Birthdays are never shared.
Trust & privacy
Your birthday stays yours
The free calculator runs in your browser and uploads nothing. AI only sees element traits, never your birth date, time or city.
Read our method and privacy notesCalculated on-device, stored encrypted
Birth details are computed locally first. If you sign in and save a profile, fields are encrypted individually and never written to logs. Local-only mode is available.
Algorithm calculates, AI explains
Four Pillars, decades and Zi Wei come from a deterministic, versioned engine. AI cannot change a result; it only puts it into plain words.
Every line has a source
Each statement is tagged: chart, corpus or AI. Differences between schools are stated openly, so you can tell calculated from written.
Export it. Delete it.
Export your data any time, or delete your account and profiles in one step. No live readings, and no judgments about health, investing or other people’s privacy.
Pricing
Free is the whole of you
Go deeper with Plus only if you want to. Prices below are shown for United States / Canada / rest of world, tax included.
Free
$0.00forever
- Full personality type and element balance
- BaZi × Zi Wei cross-view and four-letter cross card
- Daily rhythm and a daily hexagram
- Bond overview (unlimited friends)
- 3 AI follow-ups a day
Plus
Save 47% yearly$49.99/ year · about $4.17 / month
- Deep bond reports and unlimited group charts
- Full life rhythm chart and professional chart view
- 50 AI follow-ups a day
- Monthly review and history archive
- Monthly at $7.99, stop any time
Cancel in one tap · 7-day refund on your first order · No trial that quietly turns into a charge
FAQ
Good questions
Not here? Ask Xiao Wu in the app, or read our explainers.
Is this fortune prediction? How accurate is it?
No. Knowfive treats traditional Chinese birth-chart culture as one lens for looking at yourself: tendencies, timing and relationships. Everything here is a pattern or a suggestion, never a promise, and it cannot replace your own judgment.
Is my birthday uploaded?
The free BaZi calculator runs entirely in your browser and uploads nothing. Only if you sign in and choose to save a profile are your birth details sent over an encrypted connection and stored with field-level encryption. You can also turn on local-only mode, and the raw details never leave your device.
What if I don’t know my birth time?
That is fine. We build three pillars from the date, and your personality type (Day Master) and rough element balance barely change. The Zi Wei second lens needs a birth time and unlocks once you add it.
Why ask for my birth city?
To work out the local time zone and true solar time (time by the sun’s real position), which brings your hour closer to the traditional method. The city is only used in the calculation on your device.
How does this relate to MBTI or zodiac signs?
They can sit side by side. Our four-letter × Day Master card is an extra lens. Knowfive is not affiliated with The Myers-Briggs Company.
Is Xiao Wu a real person?
No. Xiao Wu is an AI guide that answers only from the facts in your chart. Every answer is labeled as AI-generated, with its basis. It will not weigh in on health, investing, legal matters or other people’s private lives.
How do I cancel?
One tap in Settings › Subscription, with a button as big as the subscribe button. Your first order is refundable within 7 days, and we remind you 3 days before renewal.
Know your five.
Enter your birthday and see yourself written in five elements in 30 seconds. Bring a friend in and see the rhythm between you. Two traditional lenses, BaZi and Zi Wei, and a stated basis for every line.
See my five in 30 seconds