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Planify vs Reminduck: catalog facts
Planify	Reminduck
Free Free and open source.	Free Free and open source under the GPL-3.0-or-later licence.
Linux	Linux
Syncs with Todoist, Nextcloud and CalDAV Native GNOME design	Simple, single-purpose reminder app Playful design with a quacking duck
Linux only Designed around GNOME, so it looks out of place on other desktops	Linux only Basic feature set compared with full task managers
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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