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ShiftSwift vs Fossify Calendar: catalog facts
ShiftSwift	Fossify Calendar
Free Free and open source under the GPL 3.0 licence.	Free Free and open source with no ads.
Android	Android
Shift blocks add several shifts at once Built for irregular working hours	No ads or tracking Syncs with Google, Outlook, Nextcloud and Exchange calendars
Android only Little documentation beyond the repository	Android only Sync relies on accounts already set up on the device
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
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.