Haifeng Cheng

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