# Account data lifecycle

- Apple subjects, refresh tokens, and account nicknames are encrypted at rest.
- Apple email and avatar data are not requested or stored.
- Deleting an account removes its session, profile, referral, grant, and mutable
  account records in the same local transaction before Apple revocation is retried.
- Product analytics installations linked to the account and all of their events
  are deleted by database cascade. The service stores only the digest of a
  random installation UUID and never stores user content in analytics events.
- Keyboard usage contains daily Chinese, English, other-character and
  input-session counters only. It never contains text or keystrokes and is
  purged after 90 days regardless of account linkage.
- Pseudonymous immutable credit-ledger entries, StoreKit transaction audit data,
  and time-limited anti-abuse tombstones remain after deletion where required to
  prevent replay, preserve financial integrity, and stop repeated trial abuse.
- Logs must never include Apple subjects, credentials, tokens, or nicknames.