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Peninsula vs Atoll: catalog facts
Peninsula	Atoll
Free Free and open source under the GPL-3.0.	Free Offered as a download to try; the homepage does not mention a paid plan.
macOS	macOS
Cmd-Tab replacement for window switching Notification counts shown at the notch	Makes use of the otherwise idle notch area Available through Homebrew as a cask
Requires Accessibility permission and manual trust of the app Small one-person project with occasional updates	Only useful on MacBooks with a notch The homepage gives little detail about features
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is 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.