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Seashore vs Acorn: catalog facts
Seashore	Acorn
Free Free and open source.	Paid One-time purchase with no subscription, after a 14-day free trial.
macOS	macOS
Native macOS interface Layers, brushes and effects for common editing tasks	No subscription, paid once AI subject selection and Live Text tool built in
macOS only Fewer features than professional image editors	macOS only Requires macOS 14 Sonoma or later
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
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 September 23, 2026

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