Troubleshooting — Classable

Most issues come down to a few common causes. Here's how to resolve them quickly.

A scan isn't marking a student present

Make sure the session is live — scans are only accepted while a session is running.
If your school uses a rotating code, it changes every 30 seconds or more; scan the current code, not a screenshot.
Check the student is enrolled in the class for that session.

A student doesn't appear in a class

Confirm they were enrolled into that class/subject (not just added to the org).
If you imported a roster, re-open the import error report — duplicates or missing fields are listed there.

Installing the app (PWA)

Android: open the site in Chrome and choose Install app / Add to Home screen.
iOS: open in Safari, tap Share, then Add to Home Screen.

Notifications aren't arriving

Notifications are delivered in-app — the bell in the top bar — and work everywhere you sign in. Parents and students also receive the relevant alerts by email. If email alerts aren't arriving, check that your school's mail settings are configured and that the right email events are switched on (see Attendance rules).

Still stuck?

Contact support and we'll help — we reply within one business day.