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.
MasterKey is built from the ground up with privacy and security as its core principles.
- 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.
- 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.
- 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.
- 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.
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.
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.
✅ Free to use — and if you love it, you can support the project by unlocking the lifetime plan for just $9.99.
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.
This project is licensed under the MIT License — you’re free to use, modify, and distribute it with attribution.
We’d love to hear from you. Open an issue or contact us through the Play Store page.
MasterKey — Your digital life, secured.