Support
Celestium
A real person answers.
If something is not working, or you just have a question, write to us. Celestium is a small, independent project; the person who builds it is the person who reads your email, and we aim to respond within a few business days.
Contact Us
Email hello@celestium.me. It helps to include your device and iOS or macOS version, and what you expected to happen versus what you saw.
Common Questions
How do I change the app's language?
Celestium is available in English and Spanish. Open Settings inside the app and choose your language; the interface and your readings switch over. If you would like to see another language supported, tell us.
How do I manage or cancel my subscription?
Subscriptions are handled by Apple, not by us, so they live in your Apple account. On your device, open Settings, tap your name, then Subscriptions, and choose Celestium to change or cancel. If you reinstall the app or switch devices, tap Restore Purchases on the paywall to bring your subscription back.
Where is my data, and how do I remove it?
Celestium computes your chart on your device. There is no account and no tracking, and your birth data stays with you unless you deliberately send a sharing invite. To remove a saved chart, delete it in the app; to remove everything, delete the app from your device.
How does sharing with another person work?
You send one encrypted link. The other person adds their own birth details on their device, and you each see the comparison between your charts. Neither chart leaves your devices unless you send that invite.
Is the astronomy accurate?
Positions come from a built-in engine validated against the reference standard from 1900 to 2090. The full numbers are on our methodology page.
I use assistive technology and hit a barrier.
Please tell us; accessibility reports are a priority. See our accessibility statement for what we support today and how to reach the accessibility inbox.
More
A short set of answers about the app and privacy lives in the Questions section on our home page. Our privacy policy and terms have the full detail.