PingMeAlive

Check in. Stay covered. A private dead man's switch: your message is sealed on your phone and only goes out if you go quiet. We can't read it. iOS + Android.

[PingMeAlive @PingMeAlive]

Check in on your schedule. Miss one and we remind you, then nudge you, then remind you once more.
Only after that do the people you chose get your sealed message. It's encrypted on your phone. We can't read it.
PingMeAlive. Coming soon to iOS and Android.