LOCAL-ONLY DATA CENTER

Progress ownership, without a hidden account.

This device has no backend login or cloud sync. Inspect what is stored, move it with a verified export, or delete it precisely.

IDENTITYThis deviceChecking secure local ID…

AUTHENTICATIONNo sign-inBackend accounts are not available.

SYNCLocal onlyNo cloud copy is created.

ACCESSFreeRead, export, and delete progress.

DATA INVENTORY

Your browser, your progress.

Checking local progress…

EXPORT

Build a verified progress package

Preview the allowlisted learning data and exclusions before downloading a format 2 JSON file.

IMPORT

Preflight before any write

Choose a Hanyu format 2 export. Conflicts preserve this device unless you explicitly choose replacement.

Choose progress JSON

When a local value differs Keep this device Replace from export

CLOUD & SUBSCRIPTION

Not connected

There is no learner login, cloud sync, payment checkout, RevenueCat identity, or server entitlement on this website. Free access is fail-closed and your existing data remains readable.

Review purchasing gate →

DELETE

Delete local Hanyu learning data

This removes allowlisted learning state and the local device identity from this origin. It cannot delete a cloud account because none exists.

Preparing local-only data controls…