Account & Sync

Your account connects identity, purchases, cloud decks, resources, and learning state across devices.

What sync covers

Deck sync can include deck information, preferences, cards, categories, tags, notes, learning schedules, learning logs, quiz logs, and resources. Resource upload and download are part of the deck sync flow.

How sync works

Cardary uses a WebSocket sync protocol with buckets, local update time, server time, and USN version tracking. Delta sync pulls remote changes after the local USN, merges deletions, pushes local updates, pushes local deletions, and records the server sync time. If delta sync is unavailable, the app can fall back to full sync.

Conflict behavior

When both local and cloud records changed, newer update time wins. If the local record is newer, Cardary touches it so it can be pushed back to the server.

Good habits

• Sign in before creating long-term decks on a new device.
• Let sync finish before switching devices after big edits.
• Sync soon after editing the same deck on two devices.
• If sync fails, retry on a stable network before making more edits.
• Read Account Deletion before deleting an account with synced content.