Compare software

SOS Alerter vs Keep Alive: catalog facts
SOS Alerter	Keep Alive
Best for: People who want a private, offline emergency alert app on Android	Best for: People living alone who want someone alerted if they stop using their phone
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the Apache 2.0 licence.
Android	Android
Sends emergency SMS and call alerts to chosen contacts Shares real-time location with trusted contacts All 3 strengths for SOS Alerter Sends emergency SMS and call alerts to chosen contacts Shares real-time location with trusted contacts Stores contacts and captured media locally on the device	Works without any ongoing interaction after setup Uses plain SMS, so contacts need no special app All 4 strengths for Keep Alive Works without any ongoing interaction after setup Uses plain SMS, so contacts need no special app Can alert several people with a custom message Actively maintained
Android only Alerts depend on SMS and phone service being available All 3 limitations for SOS Alerter Android only Alerts depend on SMS and phone service being available Small project with a short track record	Android only Depends on cellular SMS service being available All 3 limitations for Keep Alive Android only Depends on cellular SMS service being available Not a replacement for a dedicated medical alert service
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: Apache-2.0
Not stated if an account is needed	No account needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for SOS Alerter github.com/dhilipmpms/SOS-alerter f-droid.org/packages/org.sosalerter.app Catalog checked October 2, 2026	Official website Full listing and sources Sources for Keep Alive github.com/keepalivedev/KeepAlive f-droid.org/packages/io.keepalive.android Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.