# Signal Radar · Offline SOS AI — Catches the signal you can't > Offline SOS, AI first aid, and emergency hotlines for critical situations. (iPhone/iPad app by 海峰 程.) - Source: https://appshunter.io/ios/app/signal-radar-offline-sos-ai/id6759822954 (this page in markdown: same URL + `.md`) - Developer: [海峰 程](https://appshunter.io/developer/1872415836) - Category: Utilities, Travel - Price: $8.99 (on sale, was $9.99) - Rating: 5.00/5 from 4 App Store ratings - Age rating: 17+ - Requires: iOS 16.0 · 116 MB - Languages: American English - Released: 2026-03-03 - Data updated: 2026-08-27 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/signal-radar-offline-sos-ai/id6759822954/reviews.md ## What is Signal Radar · Offline SOS AI? We hope you never need this app. We built it for the moment you do. THE PROBLEM YOU CAN'T SEE In the backcountry, signal doesn't come back gracefully. It flickers — appears for half a second, vanishes, returns ninety seconds later for a second and a half, gone again. You can't catch it. Your hands are frozen, your phone is on your hip, the window closes before you can open your messages. Signal Radar's only job is to catch that window. It runs silently in the background, 24/7, scanning cellular for the tiniest flicker of reconnection. The instant signal returns — even for a fraction of a second — a pre-composed email fires to your trusted contacts: GPS coordinates, altitude, timestamp, and any custom message. Locked screen, dead-tired, or unconscious — it still works. WHEN THE SIGNAL ISN'T COMING BACK Sometimes you're not waiting for rescue. You're waiting for yourself. Snake bite. Broken bone. Burned hand. Hypothermia setting in. What do you do in the next sixty seconds? We packed Gemma 4 — Google's on-device LLM — directly into the app. Photograph a snake, the model identifies it across 50 venomous species worldwide and walks you through first aid. Photograph a sting, it identifies 40 bees / scorpions / spiders / marine toxins. Type "deep cut, my own thigh" — it talks you through pressure points, tourniquet thresholds, when to release. CPR, severe bleeding, lightning, hypothermia, heat stroke, burns, getting lost — every scenario, illustrated, on-device, zero internet. Apple Vision plus feature-vector matching drops cross-category errors to near zero. GLOBAL EMERGENCY HOTLINES · 100+ COUNTRIES Police, fire, ambulance, coast guard, fraud, consular protection — exact digits, no guessing. Say "chest pain" and the medical line surfaces. Cross a border and the local hotlines load instantly. PRIVACY-FIRST No backend. No analytics. No cloud. Your location, signal history, and chat data stay on your device. We literally can't see them. THE PROMISE We genuinely hope this sits unused on your phone for years. But if the day comes — the night your foot slides off the trail, the moment the dust storm rolls in, the second your boat takes water — we want Signal Radar to be the one light still on. Built for the day you hope never comes. ## Key features - Automatic SOS message with GPS on signal recovery - On-device AI for emergency first aid guidance - Identification of venomous species and toxins - Step-by-step illustrated emergency procedures - Global emergency hotline directory - Privacy-first design with no backend or cloud data ## Frequently asked questions about Signal Radar · Offline SOS AI ### What is Signal Radar's primary function? Signal Radar's main purpose is to automatically detect fleeting cellular signal reconnections and send an SOS message with your GPS coordinates to trusted contacts. It's designed for situations where signal is intermittent and you can't manually send a message. ### Does Signal Radar require an internet connection for its AI features? No, Signal Radar's AI features, powered by Google's on-device LLM, operate entirely offline. This means you can access first aid guidance, species identification, and emergency procedures even without an internet connection. ### How does Signal Radar handle privacy? Signal Radar is built with a privacy-first approach. It has no backend, no analytics, and no cloud storage. Your location, signal history, and any chat data remain exclusively on your device. ### What kind of emergency situations can Signal Radar help with? Signal Radar can assist with a wide range of emergencies, including snake bites, broken bones, burns, hypothermia, CPR, severe bleeding, lightning strikes, heat stroke, and getting lost. Its AI provides illustrated guidance for each scenario. ### Can Signal Radar provide emergency contact numbers? Yes, Signal Radar includes a directory of global emergency hotlines for over 100 countries, covering police, fire, ambulance, and coast guard. It can surface the correct number based on your location or a spoken emergency. ### Is Signal Radar suitable for younger users? Signal Radar has an age rating of 17+, indicating it is intended for mature audiences. This is likely due to the nature of the emergency scenarios it addresses. ### How often is Signal Radar updated? The latest version of Signal Radar is 1.1.0, and it was last updated on 2026-07-08. This suggests a relatively recent update cycle for the application. ### What devices does Signal Radar support? Signal Radar is available for iPhone and iPod devices. It is designed to run on these Apple mobile platforms. ## Version history (last 5 releases) ### 1.1.1 — 2026-07-21 1.Added status display for Dynamic Island and lock screen states 2.Optimized app stability ### 1.1.0 — 2026-07-08 1.Optimize the map types in emails and allocate corresponding map types based on different countries. 2.Improve the stability of offline large language models. ### 1.0.3 — 2026-06-10 We have fixed some bugs. ### 1.0.2 — 2026-06-09 1. Massive venomous-creature atlas: 50 snakes + 40 bees/scorpions/spiders/marine animals, photo ID with one-tap first aid 2. New offline AI capability: get emergency-response guidance from the on-device large language model with no internet required 3. Various user-experience improvements ### 1.0 — 2026-03-03 No release notes. ## More apps by 海峰 程 - [AltiMe Pro·Offline Altimeter](https://appshunter.io/ios/app/altime-prooffline-altimeter/id6758745778) - [Filmly · Shared Camera](https://appshunter.io/ios/app/filmly-shared-camera/id6773657111) - [YiBi · Private Ledger](https://appshunter.io/ios/app/yibi-private-ledger/id6795783071) All apps by 海峰 程: https://appshunter.io/developer/1872415836 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*