Privacy Policy
Last updated: February 12, 2026
Overview
Energy Control is a privacy-first personal finance application. Your financial data is stored exclusively on your local device. We do not collect, transmit, or have access to any of your personal or financial information.
What Data is Stored
All data is stored locally on your device in a SQLite database. No data is sent to external servers. This includes:
- Account names, balances, and transaction history
- Budget categories and spending records
- Savings goals, debt tracking, and investment holdings
- Game progress (city, quests, habits, XP, and coins)
Where Data is Stored
Your data is stored in a SQLite database in your operating system's user data directory. It never leaves your device unless you explicitly export it using the backup feature. Exported backups can optionally be encrypted with a password of your choosing.
No Analytics or Tracking
Energy Control does not include any analytics, telemetry, tracking pixels, or advertising SDKs. We do not track your usage patterns, financial behavior, or any other activity within the app.
Third-Party Services
The app may contact the following external services only when you explicitly use related features:
- Yahoo Finance API and ExchangeRate API — used solely to fetch current stock prices and currency exchange rates when you view your investment portfolio. No personal data is sent.
Security & Data Protection
Profile passwords are hashed using bcrypt with a cost factor of 12. Backup exports can be encrypted with AES-256-GCM using a password-derived key (PBKDF2-SHA512, 100,000 iterations). The local database itself is not encrypted at rest; however, it is stored in your operating system's user data directory and protected by your OS-level file permissions. The application runs entirely offline — no account registration or internet connection is required.
Data Deletion
You have full control over your data. You can delete individual records, reset specific sections, or erase all data from Settings > Danger Zone. Since no data is stored on our servers, deletion is immediate and permanent.
Children's Privacy
Energy Control is a general-purpose finance tracking tool. It does not knowingly collect data from children under 13. Since all data remains on-device and no data is transmitted, there is no collection mechanism to begin with.
Changes to This Policy
Any changes to this privacy policy will be included in app updates. Since the app does not collect data, policy changes are expected to be minimal.