If you have spent any time looking for a Ba Zi (八字 bāzì) app in 2026, you have probably run into Zhiji (知己). It is hard to miss. This is an honest look at what Zhiji does, where it shines, and where you might want to weigh your options. We build a competing app, so read the final comparison with that in mind. We have tried to keep the praise plain and the criticism fair.
For the wider field beyond Zhiji, our best BaZi app guide ranks every serious option by use-case.
What Zhiji is
Zhiji, whose name means “the one who knows you”, is a divination app that reads your chart across three traditional systems: Ba Zi, Zi Wei Dou Shu (紫微斗数 zǐwēi dǒushù), and the I Ching (易经 yìjīng). You enter your birth details, create an account, and receive a full reading. Where many apps in this space feel like thin wrappers around a calculator, Zhiji is trying to be a place you return to. If you are new to all of this and want the plain version first, our explainer on what a Ba Zi reading actually is is a gentler starting point than any app.
What Zhiji does exceptionally well
The first thing to say is the obvious thing: Zhiji is beautiful. The art direction is the best in this niche, full stop. Misty temples, lantern-lit streets, moody pattern illustrations. Most Ba Zi tools look like a spreadsheet wearing a costume. Zhiji looks like a product someone loved. That matters more than purists admit, because a chart you enjoy opening is a chart you will actually sit with.
The second thing is genuinely generous: the free tier is a complete reading, not a teaser. Zhiji states plainly that there is no credit card required and no feature lock, and that you get the full reading rather than a preview. Across three systems, that is a lot of substance to hand over for nothing. It also runs a large free educational library: pattern pages, hexagram pages, Zi Wei Dou Shu star pages, guides, and a daily Ba Zi weather and almanac page. The underlying pattern library spans 213 patterns across the three systems, plus a badge library for signed-in users. If you like to read around your chart and learn the vocabulary, there is real depth here to explore.
Credit where it is due on accuracy too. In our own spot check, Zhiji’s day pillar for 8 July 2026 matched our engine exactly. Both returned 癸未 (guǐ wèi). That is the right answer, and it is not something every calculator gets right. If you want to understand why day pillars are the part that trips software up, we wrote about how accurate Ba Zi calculators really are.
What to weigh before you commit
A few things are worth thinking about, none of them dealbreakers.
Sign-in is required. You cannot receive your reading without creating an account, which means handing over your birth date, time, and place along with your identity. For many people that is a fair trade. For some, it is a reason to pause. Your birth data is about as personal as data gets.
The pricing has two moving parts. Membership runs US$8.88 per month or US$88.88 per year, with a 7-day free trial, and is framed as an ongoing dialogue with your chart, including conversation memory so that session 47 is not the same as session 1. Separately there are coin packs, from 20 coins at US$5.88 up to 500 coins at US$88.88. Two currencies to reason about, subscription and coins, takes a little arithmetic to work out what you will actually spend. If you are budgeting, our guide to what a Ba Zi reading costs in Singapore may help you frame app spend against a real reading.
The engine verification is second-hand. Zhiji states its Ba Zi engine is verified against bazi-calculator.com. That is honest to disclose, and checking against another tool is better than checking against nothing. But it means the calculation is validated against another piece of software rather than against the underlying astronomy. If both tools share the same assumption, they can agree and both be wrong on an edge case.
Breadth versus depth. Three systems is a lot of ground to cover. That is a strength if you want range. It can be a constraint if what you actually want is one system read deeply.
Zhiji at a glance
| Aspect | Zhiji (知己) |
|---|---|
| Free tier | Full reading, no feature lock, no credit card |
| Systems | Ba Zi, Zi Wei Dou Shu, I Ching |
| Sign-in | Required to receive a reading |
| Membership | US$8.88/month or US$88.88/year, 7-day trial |
| Coins | 20 for US$5.88 up to 500 for US$88.88 |
| Library | 213 patterns, badges, large free educational library |
| Memory | Conversation memory on paid membership |
| Design | Outstanding, best-looking in the niche |
Zhiji vs the Butcher Boy app
| Zhiji | Butcher Boy app | |
|---|---|---|
| Free tier | Full reading, three systems | Full Ba Zi chart, reading, luck pillars, forecasts, AI companion |
| Pricing | Membership plus coin packs | Free; human readings priced separately |
| Systems | Ba Zi, Zi Wei Dou Shu, I Ching | Ba Zi only |
| Sign-in | Required | None; chart computed in your browser |
| Engine check | Against another calculator | Against astronomical ephemeris, boundary cases tested |
| Privacy | Birth data tied to an account | Birth details never leave your device |
| Human access | App only | Working sessions with a Singapore practitioner |
| Design | Exceptional, cinematic | Ink-and-gold heritage, quieter by intent |
To be fair to Zhiji: it is broader, and its visual world is richer. We build one system, plainly and precisely, and we put a human at the end of it.
Who should choose which
Choose Zhiji if you want range across three systems in one place, you enjoy a beautiful interface, and creating an account does not bother you. It is a strong, generous product and we recommend giving the free tier a try.
Choose our app if you want Ba Zi read deeply rather than three systems read broadly, you would rather not sign in or upload your birth data anywhere, and you value an engine verified against the astronomy directly. Our chart plots to exact solar-term minutes from 1930 to 2035, cross-checked against ephemeris data and publicly tested on the cases that break lesser tools: births within an hour of Lì Chūn (立春 lìchūn), the late Zǐ (子 zǐ) hour, birthplace timezone conversion. The free tier gives you four pillars with hidden stems and Ten Gods, a five-part written reading, luck pillars, forecasts, 60 chart marks, and an AI companion that stays grounded in your computed chart and never guesses pillars. If you have wondered why generic chatbots stumble here, our note on ChatGPT Ba Zi readings explains the difference. For the fuller side-by-side, see our Zhiji vs Butcher Boy comparison.
A chart is a map, not a verdict, whichever app draws it. If you are still deciding whether any of this holds up, read is Ba Zi accurate before you spend a cent. When you are ready, open our free app and pull your chart with no sign-in. And when a decision carries real stakes, a job move, a marriage, a business, that is when a person should read it with you. Our human readings are a working session with a Singapore practitioner and a written summary. No theatrics, no fear-selling, just the map read carefully.