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KashCal vs Fossify Calendar: catalog facts
KashCal	Fossify Calendar
Free Free and open source with no ads.	Free Free and open source with no ads.
Android	Android
iCloud calendar sync on Android Works with Nextcloud, Fastmail and other CalDAV servers	No ads or tracking Syncs with Google, Outlook, Nextcloud and Exchange calendars
Android only Calendar only, no task or contact management in the app	Android only Sync relies on accounts already set up on the device
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0-only
No account 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.