Set it up once, in about two minutes

Most of it does. The flashlight, compass, battery monitor, first aid guide, emergency numbers directory and medical information card all work with no connection at all. GPS works too, because it receives satellite signals rather than using mobile data. Two things do need connectivity: downloading map areas for offline use, and the banner advertising. Sending an SOS text needs cell signal, though not a data connection.

Long-pressing the SOS control starts a three-second countdown that you can cancel. When it completes, the app sends an SMS containing your GPS coordinates — plus your medical information if you have entered it — to the emergency contacts you saved. It also sounds an alternating siren through the alarm audio channel, vibrates, and begins recording your location roughly every 30 seconds so the track can be shared as a GPX file afterwards.

Yes. Your GPS coordinates are included automatically in the SOS message. You can also open the location screen at any time and copy or share your coordinates through any app on your phone, in decimal, degrees/minutes/seconds or UTM format.

Yes. It controls your phone’s LED directly through Android’s torch API. It also does not require camera permission — the app does not declare camera access in its manifest at all, so it has no ability to see through your camera.

No. Medical information and emergency contacts are stored in the app’s local storage on your device. The app has no backend server for user data, no account and no sync. That information leaves your phone only inside an SOS message that you triggered, addressed to contacts you chose.

It supports Android 8.0 and newer, which covers the large majority of Android devices in use. The release build is about 4.8 MB, so it is comfortable on devices with limited storage. Features that depend on hardware — a compass needs a magnetometer, SMS needs a SIM — are declared optional, so the app still installs and the rest of the toolkit works.

Yes, with one important condition: you must download the area you want while you still have a connection. The app caches up to 50 MB of OpenStreetMap tiles, and once an area is downloaded you can browse it and see your live GPS position on it with no connection. It is a map viewer rather than a navigation app — there is no turn-by-turn routing.

Open Settings and add up to five contacts through the standard Android contact picker. Because the picker hands the app only the contact you select, the app never requests permission to read your address book. Those contacts then receive both your SOS alerts and your one-tap “I’m Safe” check-in.

It requests permissions at the point you use a feature, never at install. Location is requested when you open the location or map screen or activate SOS. SMS is requested when you first send an alert. Notifications are requested only if you enable lock-screen SOS. It does not request camera or contacts access at all. Declining any permission disables that one feature and nothing else.

Yes. Every feature described on this site is available at no cost, with no subscription and no account. The app displays banner advertising on non-emergency screens to support development — deliberately never on the SOS or flashlight screens, where an ad would be actively harmful.

No. The app has no backend server, no account and no sync. Emergency contacts, medical information and preferences are stored in the app’s local storage on your device. The only things that leave your phone are the SOS message you trigger, map tile requests while downloading an area, and the advertising served by Google’s AdMob SDK on non-emergency screens.