# Search & Rescue - Hiking > Hiker safety · One-tap SOS · Family tracking · Offline maps · TWD97 coords Canonical page: [https://chrome-stats.com/d/com.marstw.searchrescue](https://chrome-stats.com/d/com.marstw.searchrescue) ## Overview - **ID:** `com.marstw.searchrescue` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** marschentaiwan - **Category:** HEALTH\_AND\_FITNESS - **Downloads:** 1 - **Version:** 1.0.5 - **Last updated:** 2026-09-08 - **First published:** 2026-09-04 - **Publisher country:** TW - **Size:** 59 MB - **Data as of:** 2026-09-12 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.marstw.searchrescue) - **Website:** [https://search-and-rescue-prod-179b1.web.app](https://search-and-rescue-prod-179b1.web.app/) - **Privacy policy:** [https://search-and-rescue-prod-179b1.web.app/privacy](https://search-and-rescue-prod-179b1.web.app/privacy) ## Description ⛰ For mountaineers, safety is the only path home.

Search & Rescue is a mountain safety companion built for hikers,
letting your family know you're safe on the trail,
sending instant SOS alerts, with coordinates in the format rescue services use —
one tap to copy and forward.


✨ Core Features

🆘 One-Tap SOS
· Big red button in bottom tab bar — accessible from any screen
· Long-press 1.5s to dial emergency (119 / 112 / country-specific) directly
· Instant push to all your family guardians
· Message includes WGS84 · TWD97 · DMS coordinates + Google Maps link
· 40 countries with local emergency numbers (auto-detected by location)
· 🛡 Auto-SOS: fall detection + 1-hour stillness prompt (I'm OK / Resting 8h / SOS)

👥 Family Guardians
· Invite family or friends as your guardians (up to 20)
· They see your real-time location, trail track, battery level, and altitude
· Automatic location sharing (smart background tracking, works even with screen off)
· Works offline — queued and sent when signal returns

🏔️ TWD97 Coordinates (Taiwan Rescue Standard Format)
· The ONE coordinate format Taiwan fire/mountain rescue teams use
· One-tap copy to text/email to rescuers
· Also provides WGS84 (for Google Maps) and DMS (standard aviation format)

🗺 Offline Maps (No-signal wilderness ready)
· Download OpenStreetMap / OpenTopoMap tiles before your trip
· View maps + GPS position even with zero cellular signal
· Free-form region selection (not limited to preset trails)

🥾 Hiking Trail Recording
· Auto-tracks time, distance, elevation gain/loss, avg speed
· Multi-day support (auto per-day breakdown)
· Export GPX to Garmin / Strava
· Nearby trails search + community shared details

🏅 Achievement Badges
· 15+ badges (First Trip / 100km Cumulative / 1000m Elevation, etc.)
· Custom monthly goals (distance / elevation / time)
· Celebration animation on each hike + badge unlock

❤️ Live Heart Rate
· Connects Garmin broadcast HR / Polar / Wahoo / Apple Watch
· High HR warnings (auto max HR by age)
· 5 heart rate zones displayed live

🌦 Environmental Monitoring
· Live weather + 7-day forecast (Open-Meteo)
· Barometer thunderstorm warning (3 hours ahead)
· Altitude sickness warning (hydration + slower ascent reminders above 3000m)
· Air quality + UV index
· Sunrise/sunset + remaining daylight

🗣️ Smart Companion (Human Touch)
· New area: "New place — I'll walk with you"
· Lunchtime: "It's noon, eat before you continue"
· Dusk approaching: "You're a dusk hiker — mind the dark"
· 8 contextual messages, learns from your patterns


🔐 Privacy First

· Location data auto-cleared after 90 days (GDPR + Taiwan Privacy Law compliant)
· Sign-out immediately clears cloud location history (profile kept)
· Only guardians YOU invite can see your position
· Encrypted transport (Firebase HTTPS + Firestore rules)
· Free, no ads, no trackers


🌍 11 Languages

Auto-follows system language, manual override available


🎁 Completely Free · No Ads

This app was built by a son for his father, and given as a gift
to every hiking family. May everyone come home safe.


📮 Feedback

Built-in feedback (Settings → Feedback), developer reads every message personally.
Email: searchrescuetw@gmail.com


🩺 Medical Disclaimer

Search & Rescue is not a medical device. It is not intended to diagnose, treat, cure, or prevent any disease.
Heart rate monitoring, altitude sickness alerts, and barometer warnings are for informational purposes only, not a substitute for professional medical judgment.
Consult a physician for any health concerns.


⚠️ Disclaimer

This app is a supplement, not a replacement for basic mountain preparation:
· Tell family your itinerary before departure
· Carry paper maps + compass
· Bring adequate food + warm layers
· In emergency, always call 119 / 112 first

Search & Rescue is an extra layer of protection,
so your loved ones at home can worry a little less. ## Rankings - #3,128,781 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_BACKGROUND_LOCATION` - `android.permission.ACCESS_COARSE_LOCATION` - `android.permission.ACCESS_FINE_LOCATION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.ACCESS_WIFI_STATE` - `android.permission.ACTIVITY_RECOGNITION` - `android.permission.BLUETOOTH` - `android.permission.BLUETOOTH_ADMIN` - `android.permission.BLUETOOTH_CONNECT` - `android.permission.BLUETOOTH_SCAN` - `android.permission.CAMERA` - `android.permission.FOREGROUND_SERVICE` - `android.permission.FOREGROUND_SERVICE_LOCATION` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.READ_APP_BADGE` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.RECORD_AUDIO` - `android.permission.SYSTEM_ALERT_WINDOW` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `android.permission.health.READ_ACTIVE_CALORIES_BURNED` - `android.permission.health.READ_DISTANCE` - `android.permission.health.READ_HEART_RATE` - `android.permission.health.READ_OXYGEN_SATURATION` - `android.permission.health.READ_STEPS` - `com.anddoes.launcher.permission.UPDATE_COUNT` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.htc.launcher.permission.READ_SETTINGS` - `com.htc.launcher.permission.UPDATE_SHORTCUT` - `com.huawei.android.launcher.permission.CHANGE_BADGE` - `com.huawei.android.launcher.permission.READ_SETTINGS` - `com.huawei.android.launcher.permission.WRITE_SETTINGS` - `com.majeur.launcher.permission.UPDATE_BADGE` - `com.marstw.searchrescue.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.oppo.launcher.permission.READ_SETTINGS` - `com.oppo.launcher.permission.WRITE_SETTINGS` - `com.sec.android.provider.badge.permission.READ` - `com.sec.android.provider.badge.permission.WRITE` - `com.sonyericsson.home.permission.BROADCAST_BADGE` - `com.sonymobile.home.permission.PROVIDER_INSERT_BADGE` - `me.everything.badger.permission.BADGE_COUNT_READ` - `me.everything.badger.permission.BADGE_COUNT_WRITE` ## Similar extensions and apps - [SOS - Your Personal Emergency](https://chrome-stats.com/d/com.atharibrahim.sos) — 1 users - [The SOS App](https://chrome-stats.com/d/com.thesosapp) — 769 users - [HELP — Alerte SOS d'urgence](https://chrome-stats.com/d/com.help.sos) — 9 users - [Outdoor Aficionados](https://chrome-stats.com/d/com.outdooraficionados) — 12 users - [Resqueu – SOS & Local Help](https://chrome-stats.com/d/com.techneth.resqueu) — 8 users - [Resqueu – SOS & Local Help](https://chrome-stats.com/d/com.techneth.resqueu.app) — 104 users - [Emergency SOS](https://chrome-stats.com/d/com.mehmet.acildurumuygulamam) — 2,295 users - [Safety App](https://chrome-stats.com/d/com.safetyappultra) — 252 users - [SOS Emergency Alarm – Safety](https://chrome-stats.com/d/com.artsoft.sossignal.sos_signal) — 27 users - [Personal Safety SOS Alert](https://chrome-stats.com/d/app.protectsmartly.bb2fe610e54446cebdf627db55227d7d) — 1,478 users - [RungSafe](https://chrome-stats.com/d/vn.realitech.rungsafe) - [SOS World: Emergency & Safety](https://chrome-stats.com/d/com.sefadonmez.sosworld) — 229 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.marstw.searchrescue)