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Co-Star vs tadoy

Co-Star and tadoy both compute charts and transits from the same kind of ephemeris data. The difference is what they do next. Co-Star turns the chart into a daily feed, push notifications and a friend graph. tadoy turns it into a few quiet lines on the same page that holds your journal, mood, habits and body — astrology as one ingredient, not the whole app.

At a glance

When Co-Star is the right call

Co-Star is excellent at what it set out to do. The voice is the most distinct in the category — the kind of push notification people screenshot for the group chat — and the friend graph is a real network effect that no astrology app has matched. Astrology dressed in the language of NASA ephemeris, served as a daily roast: if that's the shape of astrology you want, Co-Star wins, full stop. There's a free tier that does most of it.

Where tadoy is different

A reading, not a feed

Co-Star is built to be opened many times a day — a feed, a push, a friend's chart to scroll. tadoy is built to be opened once. Your chart distils into a few quiet lines on the Soul page — today's transits, the moon's sign and phase, where the year is — and the page hands itself back. You can read it in fifteen seconds and not think about it again.

Astrology as one ingredient, not the whole app

Co-Star is astrology-first by design. Everything in the app is the chart. tadoy treats astrology as one surface on a wider day — alongside Human Design, numerology, Gene Keys and scripture & prayer on the Soul page, and your journal, mood, habits and body on the rest of the page. The bet: most people who live alongside astrology don't want a fifth app for it.

Quieter voice, opt-in pushes

The Co-Star register is provocative on purpose — that's the product. tadoy's register is steady on purpose. The lines are written to sit next to a journal entry, not to be screenshotted for a roast. There are no default pushes; notifications are opt-in, and there is no daily nudge built to bring you back.

Birth data stays on your device

Co-Star's friend graph requires your birth details to live in their system; that's how compatibility works. tadoy has no friend graph and no social layer, so your birth date, time and place stay on your device. Charts are computed locally and never synced — the same on-device posture as journal, mood, habits and body.

So which should you pick?

Pick Co-Star if you want the feed, the daily push, the friend graph and the voice — astrology as a fun, social, frequently-opened app. Pick tadoy if you want astrology as one quiet daily line on the same page that already holds your journal, mood, habits and body — and you'd rather your birth details didn't leave your phone.

See tadoy's astrology surface See the daily page

Common questions

Does tadoy use the same astrology data?

Both apps compute charts and transits from standard ephemeris. The difference is what they do with the chart — a feed versus a quiet reading.

Is tadoy a free Co-Star alternative?

No. tadoy is paid — $9.99/month or $59.99/year, with everything included. The right comparison isn't price; it's shape.

Does tadoy have friend compatibility?

No. Co-Star's friend graph is a real moat there. tadoy has Couples (for partners) and a small Circle, but no friend-compatibility layer.

Where do my birth details go?

On your device. They stay local, are used only to compute your chart, and are never synced or used to train a model.

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