Cosmic Copilot vs Co-Star
Which astrology app names the transit and dates it, and which leads with the social feed, in 2026?
Co-Star's public product is built around short daily notes, a friend feed, and paid add-ons, and its own materials say planetary positions come from NASA data. Cosmic Copilot is built around one dated read — when it starts, when it peaks, when it clears — names the chart contact behind it, publishes the method on a methodology page, and puts the price in one line: £4.99/month or £39.99/year.
Quick Verdict
Choose Cosmic Copilot if you want the active contact named and dated — start, peak, clear — with 10 house systems, astrocartography, and a published methodology page with positions cross-checked against astro.com reference charts. £4.99/month or £39.99/year, cancel anytime.
Choose Co-Star if the social side is the point. Messaging friends inside the app and sharing your daily reading are what that product is built around, and a computed transit window is no substitute for it.
Feature Comparison
| Feature | Cosmic Copilot | Co-Star |
|---|---|---|
| Transparent chart logic (see which transit is active) | ||
| House systems supported | 10 | 1 |
| Astrocartography | ||
| Birth time rectification tools | ||
| Named start, peak, and clear dates | ||
| Social feed and friend messaging | ||
| Single transparent plan (no tiers) | ||
| Published starting price | £4.99/mo | $8.99 |
Based on publicly available information as of March 19, 2026. Not affiliated with these brands; features and pricing may change.
Switching is easy — just enter the same birth date, time, and location during onboarding.
Start with CosmicFrequently Asked Questions
Is Cosmic Copilot better than Co-Star?
They are built for different things. Cosmic Copilot is built for dated chart windows: the contact that is active, the day it peaks, the day it clears, with 10 house systems and astrocartography behind it. Co-Star is built for the social side, with friend messaging and shareable daily readings. Cosmic Copilot is also the cheaper of the two at £4.99/month.
Can I switch from Co-Star without losing my chart?
Yes. Enter the same birth date, time, and location during onboarding and Cosmic Copilot will calculate the chart again using deterministic VSOP87 ephemeris math.
Why might chart details differ between the two apps?
Differences usually come from timezone handling, house-system choices, or birth-time precision. Cosmic Copilot uses historical timezone data and supports 10 house systems, which makes chart logic easier to verify.
Does Co-Star use real astronomical calculations?
Co-Star's own materials say planetary positions come from NASA data. Cosmic Copilot uses VSOP87 ephemeris — a planetary theory used in professional astronomical almanacs — and publishes how it checks itself: positions cross-checked against astro.com reference charts in an automated test suite, including historical charts like Einstein's.