Disclosed, zero-knowledge monitoring and device management for Android.
SentinelMDM helps individuals and small businesses keep Android devices safe — without the "spyware" model. Monitoring is disclosed (the person using the device knows it's managed), and private data is protected by zero-knowledge encryption: telemetry is encrypted on the device before it's transmitted, our servers store only ciphertext they cannot read, and decryption happens exclusively in the device owner's browser.
| 👤 Personal | Disclosed monitoring built for transparency — location, app usage, screen time, web activity, and alerts, with the user's knowledge. Pricing · Setup guide |
| 🏢 Business | Android fleet management (MDM) for small teams — device policy, app control, anti-theft, and secure remote administration. Pricing |
- Disclosed by design — no stealth mode marketing. We believe monitoring works best (and is legally safest) when it's honest. Disclosed vs. stealth monitoring
- Zero-knowledge encryption — device-side envelope encryption (ECDH + AES-GCM); the server never sees plaintext location, messages, media, or logs. Only the account owner's browser holds the decryption key. How zero-knowledge monitoring works
- Data minimization — all stored data auto-purges on a hard 30-day retention limit, in line with data-minimization principles.
- Real device management — runs as an Android Device Owner (the same mechanism enterprise MDM uses), not an accessibility-service hack.
- Secure VPN — optional automatic VPN protection when the device joins open Wi-Fi.
This repository is the public home of SentinelMDM. The product source code is private; questions and support via sentinelmdm.com.