Cap Céleste

Help and contact

A question, an issue, an idea: we answer.

Write to us

Email us at capceleste.app@outlook.com. We usually answer within a few days.

To speed things up, tell us your device (iPhone, Android, computer), the app version if you know it, and what you were doing when the problem happened. A screenshot helps a lot.

In the app, the Me tab also has a feedback page to tell us what you think.

Install Cap Céleste on your phone

No store needed: the website installs like an app. You get an icon on your home screen, the app opens full screen and works even offline, outside under the stars.

On iPhone or iPad

  1. Open capceleste.com in Safari.
  2. Tap the Share button, the square with an arrow pointing up. On iOS 26, it sits in the ⋯ menu at the bottom of the screen.
  3. Scroll the list and pick “Add to Home Screen”.
  4. Tap “Add”. The Cap Céleste icon shows up with your other apps.

On Android

  1. Open capceleste.com in Chrome.
  2. If an “Install” bar shows at the bottom, tap it. Otherwise, in the app: Me tab, then “Install the app”.
  3. Another way: menu ⋮ at the top right, then “Install app”. If Chrome asks you to choose, pick “Install”, not “Create shortcut”.

With Samsung Internet, Android shows “Unsafe app” when installing. That’s normal: the app is built by Samsung rather than Google, so Android’s protection doesn’t recognize it. Tap “Install anyway”, in small print at the bottom, and it’s installed. Chrome doesn’t show this warning.

With DuckDuckGo, you can only create a shortcut to the website: open capceleste.com in Chrome instead.

On a computer: in Chrome or Edge, click the install icon at the right of the address bar.

Updates arrive on their own, nothing to download: the next time you open it, you have the latest version. Your account, progress and purchase are the same as on the website.

To remove it: long press the icon, then “Remove” (iPhone) or “Uninstall” (Android). With an account, your progress stays safe.

The sky does not match what I see

First check the place and time: the sky is computed for the location chosen in the settings (Me tab, gear at the top right).

With the gyroscope, the screen follows your phone. If North is off, move away from metal objects and wave the phone in a figure eight to recalibrate the compass, or use the manual alignment offered in the app.

The app cannot find my location

Your location is only used to compute the sky and never leaves your device. Without it, pick a place by hand: Me tab, gear at the top right.

If you denied access once, the phone remembers it, even for the installed app. To allow it again:

Also check that location is turned on for the phone. Then reopen the app and tap “Use my position”.

I bought the app, but everything is still locked

The purchase is tied to your account. Sign in with the same account you used to buy: the app picks it up on its own, on phone and on the web.

If it does not come back, write to us with the account email and the purchase date.

My progress is gone

Without an account, progress lives on the device: uninstalling the app or clearing browser data erases it. With an account, it is copied to our servers and comes back when you sign in.

The evening reminder does not ring

Check that notifications are allowed for Cap Céleste in the phone settings, and that the reminder is turned on in the app settings.

Your data

What the app keeps, where it goes and your rights are explained in the privacy policy. In short: without an account, nothing leaves your device; no ads, no selling of data.

Delete your account

In the app or on the web: Me tab, then “Delete my account”. By email: write to capceleste.app@outlook.com from the account address.

Details of what gets erased: account deletion.

Back to the sky →