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dockcheck vs Watchtower: catalog facts
dockcheck	Watchtower
Free Free and published on GitHub.	Free Free and open source.
Linux, Command line	Linux, Self-hosted
Checks for updates without pre-pulling images Interactive or fully unattended operation	Keeps running containers updated without manual pulls Actively maintained continuation of the original Watchtower
Command-line only, no graphical interface Works with Docker containers only	Automatic updates can introduce breaking changes without warning Not designed for controlled rollouts in larger production environments
Downloadable app	Self-hosted
Open source	Open source
License not stated	License: Apache-2.0
No account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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