Signal Radar.My first launch today!

Hey Product Hunt 👋

I’m Cheng,the maker of Signal Radar.

And today is my first launch.

This started with an uncomfortable realization: the moment you need your phone most — lost on a trail, injured in the backcountry, stranded in a country you don’t know — is usually the moment it stops being useful. No signal, no maps, no help, no answers.
Most “safety” apps don’t actually fix this. They need a connection, an account, or a server in the loop — exactly what you can’t reach when it matters.
Signal Radar is built the opposite way, to work when everything else goes dark:
🆘 Offline SOS — distress signaling and location tools that don’t need a network
📞 Global emergency numbers — the right number for any country, no data required
📖 Survival guides in 10 languages — first aid, shelter, water, signaling
🤖 On-device AI (Gemma) — ask survival questions with zero connection
🔒 Privacy-first — everything runs on your device. No servers, no account, no tracking.
Airplane mode, a dead zone, a mountain pass with no bars — it all still works.
I’d love your honest feedback, especially if you hike, climb, travel, or work somewhere the signal runs out. What would make this something you’d actually carry?
Thanks for checking it out 🙏