Compare software

Etar vs Agenda Tech: catalog facts
Etar	Agenda Tech
Free Free and open source.	Free Free and open source under Apache-2.0.
Android	Android
Open source with an active community Clean Material Design interface	Encrypted local calendar database Exact reminders with recurring events
Android only Sync depends on the calendar accounts set up on the phone	No calendar sync, sharing or invitations No sync between devices
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: Apache-2.0
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 September 24, 2026	Official website Full listing and sources Checked October 8, 2026

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