ZZZ Lifeline Mesh
Social Networking
Free · Designed for iPad. Not verified for macOS.
ZZZ Lifeline Mesh is a serverless, offline BLE mesh communication tool for disasters. Even when cell towers and networks are down, nearby devices connect directly over Bluetooth and relay (mesh) messages to one another.
Features:
- SOS and safety ("I'm OK") beacons: broadcast to nearby devices with one tap, optionally attaching your location
- One-to-one and group chat with end-to-end encryption (Ed25519 signatures + X25519 key agreement + AES-GCM)
- Store-and-forward delivery: messages reach recipients later via relays even if they are out of range now
- Pre-registered contacts: register family and friends in advance; they appear by name in a disaster, while unregistered nearby devices appear only as anonymous codes
- Public board (broadcast) to reach nearby people you have not paired with
- Multi-hop mesh relay (controlled flooding with TTL) reaches devices beyond direct Bluetooth range
No internet connection, no account, and no server required.
IMPORTANT: This app is a supplement to — not a replacement for — official emergency calls (110/119 in Japan) and government alerts.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added shelter search and an evacuation map.
■ Shelter search
・Approximately 115,000 designated emergency evacuation sites in Japan are bundled in the app, so you can find the nearest ones by distance even with no network coverage.
・Filter by hazard type: flood, landslide, earthquake, tsunami, large-scale fire, and more.
■ Evacuation map
・See nearby shelters on the map and get a walking route to the one you choose.
・Long-press the map to set a starting point, or set it by searching for a train station or bus stop.
・Tap a shelter pin to see crowding reports that arrived over the mesh.
■ Sharing shelter status
・Share a shelter's crowding level (5 steps) and a short note over the mesh. Your coordinates are never sent — only your distance to the shelter.
Note: Shelter data and walking-route search work offline. Displaying the map background (map tiles) requires an internet connection; areas you have already viewed are cached.
Note: This app is a supplement to official emergency services, not a replacement. In an emergency, contact your local emergency number first and follow official evacuation information.
The developer, SMOLT STAGE, K.K., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SMOLT STAGE, K.K.
- Size
- 47.1 MB
- Category
- Social Networking
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Messaging and Chat
- Copyright
- © 2026 SMOLT STAGE, K.K.
