FateChart vs Co-Star: the web alternative that shows more than your big three
Co-Star made daily astrology a habit for millions. FateChart is for the moment after that: when you want to actually see your chart, check it against Chinese astrology, and not hand over an account to do it.
Pick Co-Star if you want push-notification daily updates and friend comparisons in a polished native app. Pick FateChart if you want the full chart data — Western, BaZi, Zi Wei and numerology — free in a browser without an account, in your language, with an optional AI reading you pay for only when you want one.
At a glance
| FateChart | Co-Star | |
|---|---|---|
| Western natal chart | Yes Planets, houses, aspects, big three | Yes Core product |
| BaZi / Four Pillars | Yes Four pillars, day master, ten gods, five elements | No Not offered |
| Zi Wei Dou Shu | Yes 12 palaces, 100+ stars | No Not offered |
| Luck pillars (Da Yun) | Yes 10-year cycles with start ages | No Not offered |
| Numerology | Yes Life path, expression, soul urge, personality | No Not offered |
| Tarot | Yes Free spreads, 78 cards | No Not offered |
| Compatibility / synastry | Yes Free score, rank up to 5 people | Yes Friend compatibility in-app |
| Celebrity charts | Yes Hundreds, auto-computed from public birth data | Not stated Not found |
| Life K-Line (life-long fortune curve) | Yes Ages 1–80 as a candlestick chart, free | No Not offered |
| AI interpretation | Yes Optional, clearly labelled as AI, paid | Partial Daily automated updates; ‘Ask the Stars’ Q&A sold in-app |
| Full chart data free, no account | Yes Every chart, every system | No Account required; app only |
| Platforms | Web app — any phone or desktop browser, nothing to install | iOS + Android apps (no web chart app) |
| Languages | 8 (EN, 简中, 繁中, 日本語, 한국어, Tiếng Việt, ไทย, Indonesia) | English |
| Calculation method disclosed | Yes Public methodology page: time zones, true solar time, schools | Not stated Not found on its website |
| Birth data storage | Not stored on the server; kept only in your browser | Account-based; see its privacy policy |
| Cheapest full reading | US$3.99 (10 credits = 1 reading) · Fortune Pass US$9.99/mo for 10 | In-app purchases; prices not published on its website |
| PDF export & share link | Yes Report PDF + read-only share link | Not stated Not stated |
FateChart’s chart maths is deterministic; only the optional interpretation is AI-generated and is labelled as such.
Where Co-Star is strong
- A very large, active community: about 205,000 App Store ratings at 4.8 stars on 2026-09-11, so most of your friends are already on it.
- Daily push updates and friend-to-friend compatibility inside the app, tuned for sharing on social media.
- A distinctive editorial voice and a native iOS/Android experience with widgets.
Where FateChart is the better pick
No account, no app — the chart is just there
Co-Star requires an account and runs only as a mobile app. FateChart renders your complete natal chart (planets, houses, aspects) in any browser with nothing to install and nothing to sign up for.
Chinese astrology and numerology from the same birth time
Co-Star is Western only. FateChart also casts BaZi (Four Pillars), Zi Wei Dou Shu and numerology from the same input, so you can compare traditions instead of trusting one.
Eight languages, not one
Co-Star is English only. FateChart runs in English, Simplified and Traditional Chinese, Japanese, Korean, Vietnamese, Thai and Indonesian.
You can see how the chart was calculated
FateChart publishes its methodology — time zones, true solar time, house system, which schools it follows. Co-Star does not expose these settings to the user.
Transparent pricing for the AI part
FateChart’s AI reading is optional and clearly labelled: US$3.99 for 10 credits (one reading), or the US$9.99/month Fortune Pass. Co-Star sells ‘Ask the Stars’ and its premium tier in-app; prices are not shown on its website.
Free extras: tarot, celebrity charts, Life K-Line, PDF
Free tarot spreads, hundreds of celebrity natal charts, a Life K-Line curve of ages 1–80, a compatibility score for up to five people, PDF export and a shareable read-only link.
Switching from Co-Star to FateChart
Enter the same birth date, time and city. Your Sun, Moon and rising should match; if the rising sign differs, check the house system and the time-zone note on our methodology page — Co-Star does not let you change these. Then open the BaZi tab: it is the same birth read through the five elements, and Co-Star has nothing like it.
FateChart vs Co-Star: common questions
Is there a free Co-Star alternative that works in a browser?
FateChart. It shows your full Western natal chart, plus BaZi, Zi Wei Dou Shu and numerology, free in any mobile or desktop browser with no account.
Does FateChart have daily horoscopes like Co-Star?
FateChart focuses on the chart itself and on-demand readings rather than daily push notifications. If a daily habit loop is what you want, Co-Star does that better.
Why is my rising sign different on FateChart and Co-Star?
Usually the birth time was entered in a different time zone, or daylight-saving time was applied differently. FateChart shows the exact UTC offset it used and lets you correct it; Co-Star does not expose that setting.
Is FateChart’s reading written by AI?
The chart calculation is deterministic and free. The optional interpretation is generated by AI and labelled as such; it costs credits (US$3.99 for 10) and is for reflection, not professional advice.
Can I compare charts with friends on FateChart?
Yes. The free compatibility tool scores two charts and can rank up to five candidates; you can also share a read-only report link.
Co-Star details were checked on 2026-09-11 from its public website and app-store listings and may change; prices are as published by the vendor. Co-Star is a trademark of its owner. FateChart is not affiliated with, endorsed by or sponsored by Co-Star. Chart readings on either product are for reflection and entertainment, not professional advice.
More comparisons
See the whole chart behind your Co-Star big three
Free, in your browser, in your language. No account needed.