A private diary. Each night you write becomes a star, and nights in a row are drawn into a constellation.
Check your email.
A confirmation link is on its way to . Open it and you'll come back here already signed in.
Nothing after a minute or two? Look in spam or promotions, then send it again. If this address already has an account, no email is sent — sign in instead.
On iPhone and iPad, add Star Map Diary to your Home Screen first: tap Share, then Add to Home Screen.