Bullion Note

Privacy Policy · Updated 2026-08-07

Local-first by default

Bullion Note is a precious-metal ledger and everyday-money ledger. Core ledger data stays in the app sandbox on your current device by default. You do not need an account to use recording and valuation features.

Local data includes the category, metal, weight, purity, cost, and note in your metal ledger; ledger name, income or expense amount, category, date, time zone, and note in your life ledger; and display, market, currency, unit, and other app settings. Gold-gram values shown for life-ledger entries are recalculated from market prices and do not replace the original cash amounts.

Optional account and alerts

You may choose Google or Apple sign-in. After sign-in, a Cloudflare-hosted Worker / D1 stores data needed to operate the account: email address, display name, provider user ID, session records, and—if you enable alerts—device tokens, alert rules, and preferences. The bullionnote_session cookie lasts about 30 days. Cloudflare infrastructure also processes network information needed to complete requests.

Signing out does not clear local ledgers. Deleting an account removes server-side account identifiers, sessions, device tokens, alert rules, and preferences; related security audit records are de-identified. An anonymous deletion event and account deletion tombstone may be retained for security, abuse prevention, and data integrity. See Delete Account for details.

Quotes and backup export

Market quotes are fetched through Bullion Note's server proxy. Quote requests include the market, currency, unit, and network information needed to complete the request, but do not include your metal holdings or life-ledger entries.

The app creates bullion-note-backup.json only when you choose to export. A backup may include metal ledgers, life ledgers, categories, alerts, and settings. It is handed to the system share sheet so you choose where to save or send it. After export, the selected destination or service governs how the file is kept and processed.

Use, retention, and your choices

We use the data above to provide sign-in, sessions, quotes, alerts, backup, and support; to secure the service; and to troubleshoot issues. Bullion Note does not display ads, sell personal data, or use personal data for cross-service advertising tracking.

Local data remains until you clear it in the app or system, or uninstall the app. Account-operation data remains until account deletion or until it is no longer needed for the purposes above. De-identified records may be retained where needed for legal, security, or abuse-prevention purposes.

In the app, you can review account status, export a local backup, sign out, or delete the account. If you cannot use the app, email hi@incosmos.art to request access, correction, or deletion of account data.

Updates and contact

We may update this policy as the product or legal requirements change. The revision date appears on this page, and material changes will be communicated through an appropriate in-product notice.

Operator: InCosmos KK, Japan. For privacy questions, contact hi@incosmos.art.