Wipe
Tactical 3+3
Press the volume button 3× to arm, wait for the vibration, then press 3× again to start a 15-second wipe countdown.
Anti-forensic device protection
If they take your phone, they get nothing.
Lock, alarm, or wipe your Android from anywhere. Set triggers that fire on their own. And let people you trust pull the trigger when you can't reach your phone.
End-to-end encrypted Instant push delivery Hardened for GrapheneOS
< 1sCommand delivery
AES-256Encrypted at rest
24/7Always listening
100%You stay in control
Remote control
Three commands you can send right now
Fire any of these from the dashboard, or let a trusted contact do it. Commands are encrypted and reach the phone the second it's online.
Lock
Locks the screen and forces a fresh login. Stops anyone from getting in while you figure out your next move.
Alarm
Full-volume siren, even on silent. Find a phone down the back of the couch, or rattle whoever just took it.
Wipe
Type WIPE and the phone factory-resets as Device Owner. No countdown, no undo, nothing left to recover.
Built for the worst case
The command always gets through
Trusted contacts
Pick people who can lock, alarm, or wipe for you. Their commands are end-to-end encrypted, so only they can send them.
Push, with a poll backup
Every command is saved on the server first, then pushed. Phone offline? It runs the moment it comes back online.
Triggers that fire offline
Keyword, failed unlocks, SIM removal, dead-man timer. Set them in the app and they work with no signal and no cloud.
Wipe that can't be blocked
Sentinel runs as Device Owner, so the factory reset can't be cancelled or skipped, even on Android 11 and up.
Live device view
Last seen, battery, and every command sent, all in one place and updating in real time.
Made for GrapheneOS
No Google Play Services required. Built to run inside GrapheneOS sandboxing and stay out of the way.
Inside the app
Clean UI, serious protection
Everything in one place. Arm triggers, go dark, or check your status in seconds.
Active triggers at a glance
Organized by category
Trusted contacts and settings
Full capabilities
Every trigger, and what it does
Triggers across three layers: what you can touch, what runs on the phone, and what comes over the network. Turn on the ones that fit how you live.
01 / Local
Physical & sensor triggers
Alarm + Lock
Anti-tamper tripwire
Leave it on a table, armed. Move it and a siren goes off and the phone locks. Add a wipe if you want.
Lock
Shake-to-lock
One hard shake locks the phone and pushes the encryption keys out of memory. Your data goes back behind the lock screen.
Wipe
USB data blocker
If a data-capable USB cable is connected while the screen is locked, a wipe countdown starts immediately.
Wipe
SIM removal wipe
The moment the SIM card is physically pulled from the device, Sentinel starts the wipe procedure.
02 / Intrusion
System & break-in triggers
Wipe
Auth failure wipe
After a configurable number of wrong PIN attempts (e.g. 5×), the phone wipes itself automatically.
Wipe
Dead-man switch
If the device is not unlocked for a set period (e.g. 24h), Sentinel assumes you lost control and wipes the data.
Instant wipe
Panic shortcut
A red-cross icon on your home screen. One tap performs an irreversible wipe with no countdown, even when disarmed.
03 / Network
Network & remote triggers
Lockdown
Stingray guard (IMSI)
Watches the cell connection. Spot a fake tower (IMSI-catcher) and the phone can drop straight into lockdown.
Wipe
Notification keyword
Set a safe word. When that word arrives in any message (SMS, Signal, etc.), Sentinel reads the notification and triggers a wipe.
Lock / Alarm / Wipe
Trusted contacts
Linked friends can send a Lock, Alarm, or Wipe command to your device from their own Sentinel app, end-to-end encrypted.
Remote
Cloud dashboard
Send a remote command from the web dashboard, delivered instantly to the device through Firebase push (FCM).
04 / Go dark
Special "Go Dark" mode
Privacy
Stealth monitor
No wipe. One button kills WiFi and Bluetooth and drops you in the data settings. Radio silence, less to track.
One switch for all of it
Flip Sentinel to Disarmed and every trigger turns off, except the Panic Shortcut, which is always ready to go.
Setup in minutes
Protected in three steps
1
Install & pair
Install the app, pair it with a one-time code, and grant Device Owner so wipe works without limits.
2
Set your triggers
Decide what arms a wipe, and add the people you trust to step in if you can't.
3
You're covered
Watch your devices and send lock, alarm, or wipe from any browser, anywhere.
When it matters
When you'll be glad it's there
Lost or stolen
Lock it, set off the alarm to find it, or wipe it before anyone gets in.
Phone taken from you
A trusted contact can wipe it for you if your hands are tied.
Crossing a border
Arm the on-device triggers and let the phone defend itself.
Set it up before you need it
It takes a few minutes now so that, whatever happens to your phone later, your data stays yours. Free to start, no card needed.
Get protected