The 3-Second Defense
When you say your secret keyword (for example, "Red Weather"), Sentinel executes three critical actions simultaneously.
1. Hides Apps
Banking, photos, and social apps vanish instantly from your home screen and search. They cannot be found until you authenticate.
2. Alerts Help
A silent SMS with your exact GPS location is sent to your emergency contacts and (where supported) 911 services.
3. Locks Device
The device enters a "System Maintenance" lockdown mode. It can only be unlocked with a master password known only to you.
On Device. Encrypted. Private.
We built Sentinel with a Zero Knowledge architecture. We do not want your data, so we do not store it.
- Voice processing happens 100% offline.
- App lists and contacts never leave your phone.
- Master password is stored in Hardware Keychain.
- Works without an internet connection (SMS).
"NXT Sentinel operates independently of our servers for all core safety features. Your safety should not depend on your signal strength."