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LAN Sheriff vs LYF SOS — Offline Emergency Safety App
Provides a map of server traffic, not peer-to-peer emergency alerts.
LAN SheriffNothing leaves town unnoticed 🤠 Every server your devices talk to, live on a world map. Self-hosted, open source, zero config.
LYF SOS — Offline Emergency Safety AppSOS alerts without internet. Privacy-first emergency app.Which to pick
Pick LAN Sheriff if you want…
- Live outbound traffic map
- Server visibility
Pick LYF SOS — Offline Emergency Safety App if you want…
- Offline mesh emergency alerts
Side by side
- What it is
- LAN Sheriff:LAN Sheriff is a self-hosted, open-source tool that visualizes every outbound connection from your devices on a live world map.
- LYF SOS — Offline Emergency Safety App:LYF SOS is an offline-first emergency app that sends encrypted SOS alerts via Bluetooth and Wi-Fi Direct without internet.
- Best for
- LAN Sheriff:Live outbound traffic map
- LYF SOS — Offline Emergency Safety App:Offline mesh emergency alerts
- Who it’s for
- LAN Sheriff:Home users, hobbyists, and small-team IT admins who want privacy-first network visibility.
- LYF SOS — Offline Emergency Safety App:People in disaster-prone, remote, or censored areas needing reliable emergency communication.
- Pricing
- LAN Sheriff:Free
- LYF SOS — Offline Emergency Safety App:Free
- Open source
- LAN Sheriff:Yes, 105 GitHub stars
- LYF SOS — Offline Emergency Safety App:Yes, 0 GitHub stars
- Works with
- LAN Sheriff:Tailscale, Discord, Slack, ntfy, webhook
- LYF SOS — Offline Emergency Safety App:—
LAN Sheriff features
- Watchtower egress map. Shows a live world map with lines to every external server, including country, org, app and traffic details.
- Deputy & Patrol modes. Runs without privileges on a single machine or with elevated access to monitor all devices on a network segment.
- Radio Chatter DNS feed. Streams every DNS lookup with domain, resolver and classification of trackers or malware.
- Precinct network map. Auto-generates a diagram of devices and their connections based on observed traffic.
- Wanted List suspicion engine. Ranks and explains suspicious connections using plain-language reasons.
- Dispatch peer sharing. Pairs multiple instances to aggregate observations without exposing raw traffic.
- Export & alerts. Exports CSV/JSON and can send alerts to webhook, ntfy, Discord or Slack.
- Multi-language UI. Interface available in 12 languages, including right-to-left scripts.
LYF SOS — Offline Emergency Safety App features
- Decentralized mesh network. Creates peer-to-peer communication using Bluetooth LE and Wi-Fi Direct without central servers.
- End-to-end encryption. All messages are encrypted with ephemeral X25519 keys and destroyed after delivery.
- Zero-knowledge privacy. No accounts, no data collection, device IDs rotate every 15 minutes.
- Ultra-low power standby. Consumes under 5% battery per day while listening for SOS beacons.
- Automatic mesh relay. Devices forward SOS packets with TTL protection, extending range across many hops.
- Open-source MIT license. Source code is publicly available on GitHub and can be audited or forked.
LAN Sheriff vs LYF SOS — Offline Emergency Safety App FAQ
Is LAN Sheriff or LYF SOS — Offline Emergency Safety App free?+
Yes, both are free.
Is LAN Sheriff or LYF SOS — Offline Emergency Safety App open source?+
Yes, both are open source: LAN Sheriff (291-Group/LAN-Sheriff on GitHub, AGPL-3.0 license) and LYF SOS — Offline Emergency Safety App (lyfmail-official/lyfsos on GitHub, MIT license).
On DevHunt
LAN Sheriff
32 upvotes · Launched on DevHunt on Aug 25, 2026
LYF SOS — Offline Emergency Safety App
1 upvote · Launching on DevHunt on Oct 24, 2028
Based on each tool's website and DevHunt data. Details may change; check the official sites.