Co–Star
Co–Star: A mobile astrology app for daily guidance, birth charts, and friend compatibility. Ranked #12 of 13 in Astrology Software by our editors (6.1/10); pricing: Free plan; best for mobile users seeking daily horoscope updates.
At a glance
- Editor score6.1 / 10
- PricingFree plan
- Best forMobile users seeking daily horoscope updates
- Free planYes
- Chart systemWestern
- Facts checked24 Sep 2026
Where it wins
- Personalized daily horoscopes draw on birth date, time, and location
- Compare chart compatibility with friends or manually added charts
- Ask astrology-based questions and receive personalized answers
Where it doesn't
- Focused on mobile guidance rather than comprehensive chart work
- No desktop app or API access
- Relationship readings and question credits require purchases
Our verdict on Co–Star
Co–Star is a mobile astrology app for people who want personalized daily horoscope content and social chart insights. It uses birth date, time, and location to generate horoscope updates and natal charts, and lets users connect with friends, compare charts, and view compatibility. Push notifications deliver daily horoscope content, while astrology-based questions can receive personalized answers. The app is aimed at mobile users seeking ongoing guidance and relationship-oriented astrology rather than a broad chart-work environment.
Its social features make compatibility a central part of the experience. Users can compare charts with friends who are on the app, or manually add charts for people who are not. That gives the app a way to include relationships beyond existing app connections. Co–Star also offers paid personalized relationship readings. According to the vendor's description, its technology combines NASA Jet Propulsion Laboratory data with human astrology expertise and natural-language AI; those elements support personalized content, not a comprehensive report-building workflow. The published feature set includes transit forecasting and synastry charts, but no report builder.
Co–Star is freemium, with a free app and a la carte in-app purchases; the US App Store listing also shows a Pro-Star monthly subscription and individual purchase options. Paid features include relationship readings, manually added charts, and question credits, with purchase options potentially varying by region. The product runs on iOS and Android, with email support. Choose it if mobile horoscope notifications, friend connections, and compatibility comparisons are the main priorities. Those who need desktop access, API integration, or deeper chart analysis should look for a more comprehensive astrology tool.
Co–Star pricing
Co–Star fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Chart system | Western |
| Transit forecasting | Yes |
| Synastry charts | Yes |
| Report builder | No |
| Mobile app | Yes |
| Desktop app | No |
| API access | No |
| Deployment | Mobile |
| Platforms | iOS, Android |
| Support | |
| Built for | Solo (editorial estimate) |
| Pricing | Free plan |
| Website | costarastrology.com |
| Facts checked | 24 Sep 2026 |
Alternatives to Co–Star
- Astro GoldA multi-platform charting suite with a free iOS tier and several paid purchase options.9.9
- Astro-Vision Astrology SoftwareA broad Vedic toolkit spanning charting, forecasts and customizable reports.8.2
- Astro-SeekA broad set of web charts and forecasts, with AI-assisted readings and Android access.7.9
See all Co–Star alternatives →
Used Co–Star? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Co–Star for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Co–Star is listed in our Astrology Software directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/co-star/"><img src="https://www.itechguides.com/best/badge/co-star.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Guides on astrology software
- Best Astrology Software in 2026: Pricing, Reviews & DemoAug 2026
- The 8 Best Horoscope and Astrology Apps in 2026Aug 2026
- Unlock the Mysteries of the Stars with the Best Astrology TelescopesAug 2026
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes a score or a verdict. How we rank.
Last updated · How we research and update