Progress not syncing across devices

When sync should work

If you're signed in on two devices, your progress should sync within a minute or two of each interaction. Sync is bidirectional — newest write wins.

Not signed in. Sync only works while authenticated. Anonymous progress stays local to the browser.

Cookie/private browsing. Some browsers wipe IndexedDB when you close incognito mode. Sign in to ensure your data is server-side too.

Old browser. We need a recent Chrome/Firefox/Safari/Edge. IndexedDB is universal but Service Workers in really old versions can misbehave.

If sync ever loses something, your server-side copy is canonical. Sign out, sign back in, and your most recent server snapshot will pull down.

If something seems lost on both sides, email us — we can usually find it in our database backups within a few days.