Symptoms
You can't get past the login page — a wrong-credentials error, a confirmation email that never came, a password reset that doesn't seem to work, or a sign-in that looks like it succeeded but lands you straight back on the login page.
Possible causes
- Mistyped email or password (the most common by far).
- The account's email was never confirmed — new accounts must click the confirmation link we email before logging in.
- The confirmation or reset email landed in spam/promotions, or was sent to a different address than you think you signed up with.
- An old reset link — links expire; only the most recent one works.
- You signed up with Google and are typing a password you never set — or the other way round.
- Google sign-in was started inside another app's built-in browser (Messenger, Instagram, Facebook), where Google blocks sign-in.
- Out-of-date sign-in data saved in your browser from an older session — this can send you back to the login page however correct your details are.
How to fix
- Reset the password first. On the login page, tap Forgot password, enter your email, and use the newest link we send. Reminder: passwords need 8+ characters with an uppercase letter, lowercase letter, number, and a symbol — any character that isn't a letter or number counts, including
~,`and spaces. - Check spam, promotions, and updates folders for mail from sanddune.ai — then mark it "not spam" so future mail lands properly.
- Confirm you're using the right email. If you have several addresses, request a reset from each candidate; only the one with an account receives a link.
- Signed up but never confirmed? If you still have the browser tab or device you signed up on, go back to the Check your email screen and tap Resend confirmation email — up to three times an hour, and each resend issues a fresh 24-hour link. Otherwise request a password reset, which also confirms you control the address. Signing up again with the same email will tell you the account already exists, but it won't necessarily send you a fresh confirmation link.
- Signed up with Google? Tap Continue with Google on the login page — there's no password unless you set one with Forgot password. If Google sign-in bounces you back to the login page with a message, try once more in the same browser; if you opened SandDune inside another app, open sanddune.ai in Chrome or Safari instead. A password and Google sign-in on the same email address always lead to the same account, so you can use whichever works.
- Sent back to the login page even though your details are right? Old sign-in data stored by your browser can cause this. Clear SandDune's cookies for sanddune.ai and sign in again — on a computer in Chrome, tap the icon at the left of the address bar and open Cookies and site data → Manage on-device site data, then delete what's listed; on an iPhone, open Settings → Safari → Advanced → Website Data, search for
sanddune, and swipe to delete. This only signs you out on that device — your notes are untouched.
When to contact support
If no email arrives at the correct address after 10–15 minutes (spam checked), or you're locked out in any way these steps don't solve, write to support@sanddune.ai — ideally from the account's email address — and tell us what you've tried.