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occm vs Smither: catalog facts
occm	Smither
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0 or later.
Android	Android
Supports the occm server's custom individual and group direct messages Based on the established Moshidon client	Chronological timelines UnifiedPush notifications without Google services
Built for one specific Mastodon server Small project with few contributors	Mastodon only Small project with a single main developer
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	Account 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 2, 2026

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