Privacy Policy

1. Introduction

Lockeep is developed and provided by Sige ("we", "our", "us"). This Privacy Policy explains how we collect, use, store, and protect your personal information. By using this app, you agree to the terms of this policy.


2. Information We Collect

The app uses a Zero-Knowledge Architecture. All sensitive data is encrypted and stored only locally on your device. We cannot access your passwords or keys.

Collected information includes:

  • Master Password: Never stored on any server, only used locally for key derivation (KDF: Argon2).
    • Credentials: Including usernames, passwords, TOTP secrets, stored encrypted in local SQLite database.
      • Camera Data: Used only to scan QR codes for TOTP import, never uploaded or stored in the cloud.
        • App Usage Data: We may collect crash reports and anonymous analytics to improve the app.

          3. How We Use Information

          We use the information to:

          • Provide password management and TOTP functionality.
            • Generate strong passwords and save generator configurations.
              • Perform password health checks (weak, reused, or leaked passwords).
                • Improve app stability and user experience.

                  4. Data Storage & Security

                  • All data is encrypted using libsodium (XChaCha20-Poly1305).
                    • Data is stored only in a local SQLite database on your device.
                      • Master Password is never uploaded or shared.
                        • Even we (the developers) cannot decrypt your data.

                          5. Third-Party Services

                          The app may use the following third-party services:

                          • Google Play Services: For app distribution and updates.
                            • Crashlytics / Firebase (if enabled): To collect anonymous crash reports.

                              6. Data Sharing

                              The app does not share, sell, or trade your personal data with any third parties.


                              7. Your Rights

                              You have the right to:

                              • Delete your locally stored data.
                                • Remove the app, which will delete all stored data.

                                  8. Children’s Privacy

                                  This app is not intended for children under 18. We do not knowingly collect children’s personal information.


                                  9. Policy Updates

                                  We may update this Privacy Policy from time to time. The latest version will always be available on the Google Play app listing.


                                  10. Contact

                                  If you have any questions about this Privacy Policy, please contact us:

                                  📧 Email: sigechen5193@gmail.com