YumDayAI entitlement
Official AI entitlement is tied to your account email: each account has one SharedAiKey per platform, shared by every device on that platform. Signing out keeps the cached key on the device.
Platform separation
Credit entitlements and spendable balances are maintained separately for iOS and Android. The website APK uses Android balance only.
Revocation and account deletion
Disabling or rotating a key takes effect for every device on that platform immediately. Deleting the account invalidates server-side keys, so cached offline copies can no longer be used.