Compare software

GRR vs Teamup Calendar: catalog facts
GRR	Teamup Calendar
Free Free and open source under the GPL-2.0 licence.	Freemium A calendar can be created from the homepage; business features are sold as plans.
Web, Self-hosted	Android, Web
Runs on ordinary PHP and MySQL hosting Built for booking shared rooms and equipment	Twelve views including timeline, scheduler and table Calendars can be shared across organizations
Documentation and README mainly in French Only release builds are recommended for production	Hosted service with data on Teamup's servers Aimed mainly at business use
Self-hosted	Downloadable app, Web application, Hosted service
Open source	Closed source
License: GPL-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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