Is there a Co-Star alternative without an account?

Undersky has no account and no sign-up, and works with the internet turned off. Its App Store privacy label reads Data Not Collected. You can check any app for yourself in the App Privacy section of its App Store listing, or the Data safety section on Google Play.

Midjourney acquired Co-Star, announced on its own site on 23 July 2026 and covered by the press the next day. Bloomberg put Co-Star at about 4.3 million monthly active users, citing Sensor Tower, and Co-Star's founder and team joined Midjourney. This does not change how the app works today, but ownership is worth knowing when you are deciding who holds your birth data.

Co-Star alternatives in 2026, and who should just stay on Co-Star

Q: What is the best Co-Star alternative?

It depends what made you look. For a teacher rather than a feed, CHANI. For psychological depth, The Pattern. For professional chart tools, TimePassages. For keeping your birth data off the internet and having no account, Undersky. If what you like about Co-Star is the friend layer and the voice, no alternative replaces it and you should stay.

Q: Should I switch away from Co-Star?

Not if you use it for the friend layer and the writing, because nothing else does those as well. Switch if you want an app that explains where a reading came from, one that does not need an account, or one without a subscription.

Published 10 August 2026 by Pacefyx, Inc. We make Undersky, which is one of the alternatives below. We have tried to be straight about who should not switch.

The right alternative depends on what made you look. If you like Co-Star for the friend layer and the writing, nothing here replaces it and you should stay.

Co-Star is the app that made a generation care about their rising sign, it uses real astronomy data, and the writing has a flat confidence nobody else has matched. Those are real reasons to keep it. Below is what to move to if something specific is bothering you.

What is the best Co-Star alternative?

If what you want is	Try	Why
A teacher, not a feed	CHANI	One astrologer's written and audio guidance, warm and unhurried
Psychological depth	The Pattern	Reads like a description of you and of the phase you are in
Proper chart tools	TimePassages	Precise traditional charts for people studying astrology
A human being	Sanctuary	A live astrologer who can hear what you are actually asking
No account, and your data on your phone	Undersky	No sign-up, works offline, and explains where each reading came from

Who should stay on Co-Star?

Anyone who uses it to see friends' charts, or who stays for the voice. Those are the two things Co-Star does better than anything else, and no app on this page is a replacement for either.

Astrology is social for a lot of people, and Co-Star is the only one of these built that way from the start. If your friends are all on it, switching costs you the thing you actually use.

Who bought Co-Star, and does it matter?

Midjourney acquired Co-Star, announced on its own site on 23 July 2026. Bloomberg reported the next day that Co-Star had around 4.3 million monthly active users, citing Sensor Tower. Co-Star's founder and her team joined Midjourney.

This does not change how the app works today, and it is not a reason on its own to leave. It is worth knowing because whoever owns an app also has whatever that app collected, and apps change hands. That is a general point about handing over data, not a criticism of either company.

If that thought is what brought you here, the useful move is not to switch apps on vibes. It is to read the privacy section on each app's store page and decide from what is actually declared. We wrote a short guide to doing that, including the one thing those labels do not cover.

What is the closest alternative to Co-Star without an account?

Undersky, which has no account and no sign-up, and works with the internet turned off. Its App Store privacy label reads "Data Not Collected". We make it, so check that on the store page rather than taking it from us.

The things it does that Co-Star does not: every reading can show its working, under a button that says "Show what this reading came from". Each relationship is read as the kind of relationship it is, so a parent and child are never read like a couple. You can switch between whole sign and Placidus houses and it tells you what changes.

The things Co-Star does that Undersky does not: the friend feed, and the particular voice. Undersky has no social layer at all. If that is the draw, this is the wrong swap.

Undersky's daily horoscope, birth chart and its reading, and a first look at your year are free, with no subscription. It is written in 26 languages.

Common questions

Is there a free Co-Star alternative?

Undersky's daily horoscope, birth chart and reading, and a first look at your year are free with no subscription and no account. The Pattern and Co-Star both have free tiers with a paid upgrade.

Which astrology app does not require an account?

Undersky does not. Most of the well-known astrology apps do. What any given app then holds is something you can check before installing, in the privacy section of its store page.

Is there a Co-Star alternative that explains its readings?

Undersky has a button on every reading that says "Show what this reading came from", which lists the placements the reading was built on.

Should I switch away from Co-Star?

Not if you are there for the friends and the writing. Switch if you want an app that explains its readings, does not need an account, or has no subscription.