Feature
Internet-free Messaging — Bluetooth & Local Network
When there's no signal, Bluetooth Low Energy and the local network take over; the device next to you stays in reach. Chat and games keep going with no internet. Whichever channel is used, no message is stored on our servers.
Highlights
- Bluetooth Low Energy (BLE) — close range
- Wi-Fi / local network (mDNS) discovery
- Internet and close range always run in parallel
- Works in airplane mode with Bluetooth on
Overview
Traditional messengers stop working when they can't reach a server. Zerolog was built differently: if two devices are physically near each other, it can cut the internet out of the loop entirely. Thanks to your phone's Bluetooth Low Energy radio and local-network (mDNS/Bonjour over Wi-Fi) discovery, devices find each other directly and carry data directly.
That means chat and games keep working on a plane, in a subway tunnel, on a mountain, in a concert crowd, or anywhere mobile data is congested. Airplane mode doesn't turn off Bluetooth; most airlines allow it, so your link to the friend in the next seat survives.
The key point: close range and the internet channel aren't alternatives — they're complementary. Zerolog automatically picks the fastest available route; you just pick who to talk to. Whichever route is used, message content never touches our server.
Related features
On the Internet: End-to-End Encrypted Messaging
On Wi-Fi or mobile data, Zerolog opens an end-to-end encrypted (E2EE) channel in parallel. Keys are generated on your device, never leave for a server. Message content can be decrypted only on the two devices — no one, including us, can read it.
Ephemeral (Self-Destructing) Messages
Each chat gets a lifetime: burn on read, seconds, minutes, hours, or wipe-on-session-end. When the timer runs out, the message is gone from both devices. No undo — because there was no save.
Peer-to-Peer Voice Calls
Zerolog offers encrypted peer-to-peer voice calls. Audio flows directly between the two devices and rings with a native call UI on the lock screen. Call history is not kept.
Pairing with Mutual Approval
Every new pair requires the recipient's approval. The request shows up on their screen — accept or decline. Silent messaging is impossible.