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Retro vs Clocks: catalog facts
Retro	Clocks
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-2.0-or-later licence.
Linux	Linux
Customizable segment display appearance Can run always on top as a widget	World clocks, alarms, stopwatch and timers in one app Regular releases from the GNOME project
Only shows a clock, with no alarms or timers mentioned Small project with infrequent development	Linux only and designed around GNOME Covers basic time-keeping only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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