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The Clock vs Zham: catalog facts
The Clock	Zham
Paid Free download available, with a purchase required for the full app.	Free Free and open source under GPL-3.0-or-later.
macOS	Android
Meeting planner slider that handles daylight saving Business hours and holiday tracking for contacts	Converts times across cities and dates Includes a resizable home-screen widget
macOS only Proprietary and paid	Android only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
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 8, 2026

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