README.md

September 26, 2025 · View on GitHub

💡 What is MasterKey?

MasterKey is a privacy-focused, 100% offline password manager designed to securely store:

  • 🔑 Passwords (email, social, apps, servers)
  • 💳 Credit/debit cards (Visa, MasterCard, etc.)
  • 🪙 Crypto wallet secrets & keys
  • 🔐 Secure collections for organizing your data

With a sleek modern Material You interface, MasterKey offers a no-ads, distraction-free, highly secure experience — entirely offline and completely private.

🔐 How MasterKey Protects Your Data

MasterKey is built from the ground up with privacy and security as its core principles.

✅ End-to-End Encryption

  • All your data (passwords, cards, keys) is locally encrypted using a key derived from your Master Password.
  • Your Master Password is NEVER stored — not even on your device.

🧠 In-Memory-Only Processing

  • The Master Password and decrypted data exist only in memory while the app is open.
  • Once the app is closed, all sensitive data is wiped from memory.
  • What remains on disk is encrypted, and without the Master Password, it’s unreadable.

📴 100% Offline & Local Storage

  • MasterKey does not connect to the internet — ever.
  • No remote servers, no cloud syncing, no analytics, and no background tracking.
  • Your data never leaves your device.

🛡️ Unbreakable Protection (Quantum-Level Difficulty)

  • The encryption used is strong enough that breaking it would require quantum computing power, which is not publicly available yet.
  • Even if your device is hacked, no one can access your data without your Master Password.

🎯 Why Open Source?

We’ve made MasterKey open source so that:

  • 🧑‍💻 Anyone can audit the code and verify how it works.
  • 🤝 Developers can contribute and help improve security, features, and performance.
  • 💬 The community can build trust through transparency.

Your privacy is our mission — not just a feature.

🧾 No Third-Party Services

Unlike many apps that integrate:

  • Google Analytics
  • Firebase
  • Crashlytics

We’ve intentionally avoided all such third-party tools. Your usage data stays with you, and your activity is not tracked. We prioritize your privacy over developer convenience.

🚀 Try MasterKey Today

Get it on Google Play Download on the App Store

✅ Free to use — and if you love it, you can support the project by unlocking the lifetime plan for just $9.99.

👥 Contribute

Want to help improve MasterKey?

  • 🌟 Star the project
  • 📂 Fork and submit PRs
  • 🐞 Report issues
  • 🛠️ Suggest features

Let’s build the most private, reliable password manager together.

📄 License

This project is licensed under the MIT License — you’re free to use, modify, and distribute it with attribution.

🙌 Support & Feedback

We’d love to hear from you. Open an issue or contact us through the Play Store page.

MasterKey — Your digital life, secured.