Oksigenia SOS

Oksigenia SOS is an offline-first personal safety app for outdoor sports and high-risk environments. No account, no cloud, no Google Services required — everything runs on your device.

When something goes wrong, it sends an SMS alert with your GPS coordinates to your emergency contact. No internet connection needed.


Smart Fall Detection (Smart Sentinel)

The accelerometer monitors you continuously at high frequency. A sudden impact triggers an observation window. If sustained walking movement is detected during that window, the alarm is dismissed automatically — false positives from drops or normal jolts won't fire the SOS. If no rhythmic movement is detected, the SOS is sent.


Activity profiles

Pick the profile that matches what you're doing — Smart Sentinel adapts its sensitivity:

- Trekking / Hiking: balanced default for walking outdoors.
- Running (road): tuned for the sustained high-G cadence of road running, with an adaptive rhythm detector.
- Trail running / MTB: higher impact threshold for terrain with constant vibration.
- Mountaineering: longer observation window for slow recoveries on technical ground.
- Paragliding / Kayak / Watersports: automatic fall detection is disabled (the sensor cannot reliably interpret flight or water motion); inactivity monitor and manual SOS remain active.
- Professional / Rescue: extended observation window for advanced operational use.


Inactivity Monitor (Dead Man's Switch)

Set a check-in timer. If you don't confirm you're OK before it expires, the alert is sent automatically. Essential for solo adventures where a fall might leave you conscious but unable to call for help.


Live Tracking

Send your GPS position by SMS every 30, 60 or 120 minutes. Pause, resume or check in manually at any time — without stopping the monitoring session.


Dying Gasp

When the battery drops below 5%, a final SMS with your last GPS position is sent automatically before the phone shuts down.


Privacy and Compatibility

- No account or registration required
- All data stays on your device — no cloud sync, no telemetry
- No trackers, no analytics, no ads
- Works on de-Googled phones (GrapheneOS, MicroG)
- Open source under GPLv3


About the permissions

Oksigenia SOS asks for sensitive permissions because its job is to call for help when you cannot. Each one maps to a single rescue function:

- SMS: sends the alert. SMS is the only channel that works in the mountains without internet.
- Location, including "Allow all the time" (background location): when you fall, your phone is in your pocket with the screen off and the app in the background. Without background access, Android can deny a fresh GPS fix at exactly that moment, and the SOS would leave without usable coordinates. Your position is read only when an alert or tracking update is being sent, and it travels exclusively inside the SMS to the contacts you configured — it is never uploaded anywhere. The app's only network use is a version check against a static file on oksigenia.com, which carries no personal data and no location.
- Motion sensors / physical activity: fall and inactivity detection.
- Battery exemption: so Android doesn't kill the monitoring service mid-route.

A safety app that prioritised permission minimalism over getting your coordinates to a rescuer would be failing at its only job. The privacy guarantee here is structural, not cosmetic: everything stays on the device.

Available in 11 languages.

IMPORTANT: Oksigenia SOS is a support tool and does not replace professional emergency services. Its operation depends on mobile coverage, GPS signal and battery level.

Is Oksigenia SOS free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Oksigenia SOS require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Oksigenia SOS safe to install?
We link to the exact APK published by Oksigenia. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Oksigenia SOS?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

1. Tap the Download APK button above and save the file to your device.
2. Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
3. Open the downloaded com.oksigenia.oksigenia_sos.apk file from your Downloads folder.
4. Tap Install and wait for Android to finish.
5. Open «Oksigenia SOS» by Oksigenia and grant only the permissions it actually needs.
6. Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.