Mobile app · Security & privacy

SOS Alerter

Privacy-focused emergency app with SMS location tracking and silent recording.

Completely free
Android
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by F-Droid
License: GPL-3.0+ — Open source (copyleft)confirmed by F-Droid
Open source: Yes
Commercial use: Yesconfirmed by F-Droid
Account required: not documented
Credit card required: Noconfirmed by F-Droid
Watermark: Not applicable
Ads: No
Platforms: AndroidEstablished by Android: F-Droid
Publisher: Dhilip
Latest version: 1.1.1 (28 July 2026)
Latest activity: 28 July 2026
Source code: github.com/dhilipmpms/SOS-alerter

Overview

Features described in its F-Droid listing: GPS track recording, voice input and commands.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“Continuous GPS Tracking: Keep contacts updated with periodic location sharing.” — F-Droid, 10 November 2026
“Versatile Activation Triggers: Trigger an alert via a triple-press of the power button, shaking the device, voice commands ("Help Me"), or a long press on the main screen button.” — F-Droid, 10 November 2026

At a glance

SOS Alerter is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
No advertising
Commercial use allowed

Sources and checks

Facts collected from F-Droid (credit card, source code, publisher, licence, free status, platforms, ads, commercial use, version) — 7 November 2026
Last technical check: 7 November 2026
Description from F-Droid — F-Droid (citation courte)

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