RANKAN: Off-Grid Mesh Comms & SAR
Built by a firefighter for group safety with zero signal.
What it does
RANKAN turns your phone into a professional off-grid communication system. Built by a firefighter to solve real-world "dark zone" gaps, it uses mesh networking to keep your group connected without cell towers, Wi-Fi, or internet. • Adventure Mode: PTT radio, live group mapping, and one-tap SOS. • Professional Mode: Full ICS logging, PAR reports, and sector drawing for SAR teams. No accounts, no ads, and 100% free. Just direct device-to-device safety when the grid fails.
Does the same job
all alternatives →
- OGOff Grid – Run AI text, image gen, vision offline on your phoneFeb 2026 · github.com · ▲124
Your phone has a GPU more powerful than most 2018 laptops. Right now it sits idle while you pay monthly subscriptions to run AI on someone else's server, sending your conversations, your photos, your voice to companies whose privacy policy you've never read. Off Grid is an open-source app that puts that hardware to work. Text generation, image generation, vision AI, voice transcription — all running on your phone, all offline, nothing ever uploaded. That means you can use AI on a flight with no wifi. In a country with internet censorship. In a hospital where cloud services are a compliance…
- WAWaycore – an open-source, offline-first modular field computerDec 2025 · ▲49
Hi HN, I’m building Waycore, an open-source project exploring what a flexible, offline-first field computer should look like for outdoor, survival, and off-grid scenarios. The core goals are adaptability and resilience: modular hardware (external sensor/tool modules) extensible OS with support for external apps (guidelines in progress) no required internet connection — maps, models, and knowledge work offline optional LTE/Wi-Fi when available and explicitly enabled A major focus is on-device agentic AI, not just chat or image recognition. The AI is intended to: read live sensor…
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