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Unofficial CheckMK Monitoring vs Open Alert Viewer: catalog facts
Unofficial CheckMK Monitoring	Open Alert Viewer
Free Free and open source under the GPL-2.0 licence.	Free Free and open source under the MIT licence.
Android	Linux, Android
Dashboard of host and service states Notifications when states change	One view for Prometheus, Nagios, Icinga and Zabbix alerts Runs on both Android and Linux desktop
Requires an existing CheckMK server and login Unofficial, not supported by the CheckMK vendor	Zabbix support is partial Only Basic Authentication for most backends
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: MIT
Account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.