Personalized astrology built on NASA data
Co-Star is an astrology app built around personalized daily horoscopes, birth chart readings, and chart comparisons with friends. It describes itself as decoding human relationships "through NASA data and biting truth," and uses astrology as a way to understand yourself and the people around you, a quick route past small talk into real conversation. Its view is that there are no bad zodiac signs, only complicated dynamics. Co-Star has been App of the Day twice and has been covered by the New York Times, Vogue, and Vanity Fair.
Where the charts come from
Co-Star uses NASA data to calculate the exact positions of the stars in real time. Human astrologers interpret that data, working with AI technology to produce the birth charts and daily horoscopes in the app.
Core features: daily horoscopes and friend charts
The app is free to download. The core features cover:
- Adding friends to compare natal charts and check compatibility.
- A personalized daily horoscope.
- A daily push notification based on that day's horoscope.
- Learning to read your full birth chart.
Premium: questions, other people's charts, and Eros
Premium adds:
- Ask the stars: put your deepest, darkest questions to the app and get answers.
- The full natal chart of someone who does not use Co-Star.
- A complete personalized report on how you love and why.
- Eros, a feature for couples that applies your zodiac compatibility to everyday relationship situations.
The iOS app is free, Premium features are paid, and the app is available in English only.
