Privacy Policy

1. Introduction

WalletMap is committed to protecting your privacy. This Privacy Policy explains what information we collect, how we use it, and your rights regarding your data. Our core principle is zero server-side storage of your financial data.

2. Data Controller

WalletMap operates as the data controller for the limited personal information described in this policy. For questions regarding your data, please contact us via the information provided on our website.

3. Information We Collect

• Google account basic profile information (name, email, profile picture) for authentication purposes.
• Session data required to maintain your login state.
• Your locale preference (language setting).

4. Information We Do NOT Collect

• Your bank account balances or financial institution details.
• Your stock portfolio holdings or trading data.
• Your cryptocurrency wallet addresses or holdings.
• Your transaction history or financial records.
• All of the above data is stored exclusively in your own Google Sheets, which only you can access.

5. How We Use Your Information

• To authenticate you via Google OAuth and maintain your session.
• To create and access your personal Google Sheets spreadsheet for asset tracking.
• To fetch real-time price quotes and exchange rates from third-party APIs on your behalf.
• We never sell, share, or transfer your personal information to third parties for marketing purposes.

6. Cookies and Local Storage

• Session cookie (next-auth.session-token): Essential for maintaining your authenticated session.
• Locale preference cookie: Stores your language choice (zh-TW or en).
• Cookie consent (localStorage): Records your cookie preference choice.
• We do not use any third-party tracking cookies or analytics cookies.

7. Third-Party Services

• Google OAuth: For authentication and Google Sheets access.
• CoinGecko API: For cryptocurrency price data.
• FinMind API: For Taiwan stock market data.
• Yahoo Finance: For US stock market data.
• ExchangeRate-API: For currency exchange rates.
• These services have their own privacy policies. We only send the minimum data required to fetch prices and exchange rates — no personal financial data is shared with these services.

8. Data Retention

Your authentication session data is retained only while your session is active. Your financial data in Google Sheets persists independently of our service and is retained as long as you choose to keep it in your Google Drive.

9. Your Rights

• Access: You can view all your data directly in your Google Sheets at any time.
• Deletion: You can delete your Google Sheets data at any time. You can also revoke our access through your Google account settings.
• Portability: Your data is already in a portable format (Google Sheets) that you fully control.
• Objection: You can stop using the service at any time without any impact on your stored data.

10. Children's Privacy

WalletMap is not intended for use by children under the age of 13. We do not knowingly collect personal information from children.

11. Policy Changes

We may update this Privacy Policy from time to time. We will indicate the last updated date at the top of this page. Continued use of the service after changes are posted constitutes acceptance of the revised policy.

12. Contact

If you have any questions about this Privacy Policy, please contact us via the information provided on our website.