Never Walk or Train Alone. Your Real-Time 500-Meter Safety Network.
Arm Sentinel Mode and lock your phone in your pocket. If an impact, heart-rate panic spike, or hands-free voice command is detected, UDL Sentinel alerts verified Guardians within 500 meters and records tamper-proof SHA-256 video evidence directly to the UDL Cloud Server.
500m Community Radar
During an SOS event, all verified members (KYC + Face ID) within 500 meters receive a high-priority red alert with your exact GPS pin and live witness camera stream.
Silent Duress PIN
Forced to disarm your phone under threat? Enter your Duress PIN: the screen fakes a normal shutdown while silently broadcasting a priority SOS and recording evidence in the background.
96-Hour Anti-Tamper Vault
Every video clip is sealed with a SHA-256 cryptographic hash on the UDL Cloud Server. Evidence cannot be deleted on the same day—deletions require a 4-day cooling period and identity verification.
ETA Check-In & BLE Sensors
Set an estimated arrival timer or pair a Bluetooth heart-rate band: if the timer hits zero without your PIN or your pulse spikes, the SOS protocol triggers automatically.
