Deadman Switch
Deliver encrypted messages when you can't
📱 Download APKVersion 2.0 • Android
End-to-End Encrypted
Messages are encrypted with recipients' GPG public keys. Only they can decrypt them.
Automatic Delivery
If you don't check in within your set timeframe, messages are automatically delivered.
Background Service
Runs silently in the background, sending periodic check-ins to the server.
Auto Key Fetch
Automatically fetches GPG keys from ProtonMail and keys.openpgp.org.
How It Works
Add Recipients
Add the email addresses of people who should receive messages. Their GPG keys are fetched automatically.
Write Messages
Compose messages for each recipient. They're encrypted locally before being stored on the server.
Set Your Timers
Configure how long without check-in before warning emails go out, and when messages are delivered.
Enable Background Service
The app checks in periodically. Miss enough check-ins, and your messages are delivered.
🛡️ Security First
Your plaintext messages never leave your device unencrypted. The server only stores GPG-encrypted blobs that only your recipients can decrypt with their private keys.