Keep your binder safe across devices.
Accounts sync your Ninefoil binder automatically. A copy also stays on each device, so you can keep arranging pages offline.
Automatic saving
Sign in and edit normally. The status reads Saving… while an upload is running, then Saved. Offline · saved on this device means your changes are on the device and will retry after reconnection. Turning pages does not upload a new binder revision.
Keep an independent copy
Open Collection → More → Import or export. Full JSON preserves pages, card identities, variants, ownership, quantities, condition and notes. Inventory CSV includes those card fields for spreadsheets; it does not replace a full layout backup. Your account menu also offers Download a copy (JSON).
When two copies differ
A normal reload is silent. If both devices have edited the binder independently, choose the account copy or the device copy in the in-app dialog. The copy you replace is kept in Restore previous copy in your account menu. Only the latest recovery copy is retained; download JSON for a longer history.
Import safely
JSON restores a complete binder after validation. Your previous device copy is retained. CSV merges matching printing identities, including language and variant, and preserves owned versus wishlist status. Use Undo immediately if you import the wrong inventory.
Signing out or deleting an account
Signing out keeps the device binder by default. A cleanly synced binder can optionally be removed from the device when signing out. Account deletion removes cloud data but keeps the current device copy as a guest binder. Browser site-data settings remove local working and recovery copies.